Adding generator
This commit is contained in:
Matthias Melcher
parent
10d9010ed9
commit
0c8083a06d
@ -133,7 +133,7 @@ CREATE_EXAMPLE (resize-example5c "resize-example5c.cxx;resize-arrows.cxx" fltk)
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CREATE_EXAMPLE (rotated_text rotated_text.cxx fltk)
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CREATE_EXAMPLE (scroll scroll.cxx fltk)
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CREATE_EXAMPLE (subwindow subwindow.cxx fltk)
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CREATE_EXAMPLE (sudoku "sudoku.cxx;sudoku.plist;sudoku.icns;sudoku.rc" "fltk_images;fltk;${AUDIOLIBS}")
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CREATE_EXAMPLE (sudoku "sudoku.cxx;sudoku_generator.cxx;sudoku.plist;sudoku.icns;sudoku.rc" "fltk_images;fltk;${AUDIOLIBS}")
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CREATE_EXAMPLE (symbols symbols.cxx fltk)
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CREATE_EXAMPLE (tabs tabs.fl fltk)
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CREATE_EXAMPLE (table table.cxx fltk)
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@ -131,6 +131,7 @@ CPPFILES =\
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shape.cxx \
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subwindow.cxx \
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sudoku.cxx \
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sudoku_generator.cxx \
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symbols.cxx \
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table.cxx \
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tabs.cxx \
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@ -596,19 +597,19 @@ scroll$(EXEEXT): scroll.o
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subwindow$(EXEEXT): subwindow.o
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sudoku: sudoku.o
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sudoku: sudoku.o sudoku_generator.o
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echo Linking $@...
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$(CXX) $(ARCHFLAGS) $(CXXFLAGS) $(LDFLAGS) sudoku.o -o $@ $(AUDIOLIBS) $(LINKFLTKIMG) $(LDLIBS)
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$(CXX) $(ARCHFLAGS) $(CXXFLAGS) $(LDFLAGS) sudoku.o sudoku_generator.o -o $@ $(AUDIOLIBS) $(LINKFLTKIMG) $(LDLIBS)
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$(OSX_ONLY) $(RM) -f -r sudoku.app
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$(OSX_ONLY) mkdir -p sudoku.app/Contents/MacOS sudoku.app/Contents/Resources
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$(OSX_ONLY) $(INSTALL_BIN) sudoku$(EXEEXT) sudoku.app/Contents/MacOS
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$(OSX_ONLY) $(INSTALL_BIN) mac-resources/sudoku.icns sudoku.app/Contents/Resources/
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$(OSX_ONLY) $(INSTALL_BIN) mac-resources/sudoku.plist sudoku.app/Contents/Info.plist
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sudoku.exe: sudoku.o sudoku.rc
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sudoku.exe: sudoku.o sudoku_generator.o sudoku.rc
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echo Linking $@...
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$(RC) sudoku.rc sudokures.o
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$(CXX) $(ARCHFLAGS) $(CXXFLAGS) $(LDFLAGS) sudoku.o sudokures.o -o $@ $(AUDIOLIBS) $(LINKFLTKIMG) $(LDLIBS)
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$(CXX) $(ARCHFLAGS) $(CXXFLAGS) $(LDFLAGS) sudoku.o sudoku_generator.o sudokures.o -o $@ $(AUDIOLIBS) $(LINKFLTKIMG) $(LDLIBS)
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symbols$(EXEEXT): symbols.o
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222
test/sudoku.cxx
222
test/sudoku.cxx
@ -135,7 +135,7 @@ class SudokuSound {
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class SudokuCell : public Fl_Widget {
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bool readonly_;
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int value_;
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int test_value_[9];
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int marks_;
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public:
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@ -144,11 +144,13 @@ class SudokuCell : public Fl_Widget {
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int handle(int event) FL_OVERRIDE;
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void readonly(bool r) { readonly_ = r; redraw(); }
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bool readonly() const { return readonly_; }
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void test_value(int v, int n) { test_value_[n] = v; redraw(); }
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int test_value(int n) const { return test_value_[n]; }
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void mark(int n, bool set);
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void toggle_mark(int n);
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bool mark(int n);
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void clear_marks();
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void value(int v) {
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value_ = v;
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for (int i = 0; i < 8; i ++) test_value_[i] = 0;
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clear_marks();
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redraw();
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}
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int value() const { return value_; }
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@ -483,7 +485,9 @@ void SudokuSound::play(char note) {
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// Create a cell widget
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SudokuCell::SudokuCell(int X, int Y, int W, int H)
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: Fl_Widget(X, Y, W, H, 0) {
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: Fl_Widget(X, Y, W, H, 0),
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marks_(0)
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{
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value(0);
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}
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@ -491,15 +495,17 @@ SudokuCell::SudokuCell(int X, int Y, int W, int H)
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// Draw cell
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void
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SudokuCell::draw() {
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static Fl_Align align[8] = {
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static Fl_Align align[10] = {
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0,
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FL_ALIGN_TOP_LEFT,
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FL_ALIGN_TOP,
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FL_ALIGN_TOP_RIGHT,
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FL_ALIGN_LEFT,
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0,
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FL_ALIGN_RIGHT,
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FL_ALIGN_BOTTOM_RIGHT,
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FL_ALIGN_BOTTOM,
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FL_ALIGN_BOTTOM_LEFT,
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FL_ALIGN_LEFT
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FL_ALIGN_BOTTOM,
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FL_ALIGN_BOTTOM_RIGHT,
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};
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@ -527,11 +533,11 @@ SudokuCell::draw() {
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fl_draw(s, x(), y(), w(), h(), FL_ALIGN_CENTER);
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}
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fl_font(FL_HELVETICA_BOLD, h() / 5);
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fl_font(FL_HELVETICA_BOLD, h()*2/9);
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for (int i = 0; i < 8; i ++) {
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if (test_value_[i]) {
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s[0] = test_value_[i] + '0';
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for (int i = 1; i <= 9; i ++) {
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if (mark(i)) {
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s[0] = i + '0';
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fl_draw(s, x() + 5, y() + 5, w() - 10, h() - 10, align[i]);
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}
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}
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@ -578,27 +584,8 @@ SudokuCell::handle(int event) {
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}
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if (Fl::event_state() & (FL_SHIFT | FL_CAPS_LOCK)) {
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int i;
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for (i = 0; i < 8; i ++)
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if (test_value_[i] == key) {
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test_value_[i] = 0;
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break;
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}
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if (i >= 8) {
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for (i = 0; i < 8; i ++)
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if (!test_value_[i]) {
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test_value_[i] = key;
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break;
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}
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}
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if (i >= 8) {
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for (i = 0; i < 7; i ++) test_value_[i] = test_value_[i + 1];
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test_value_[i] = key;
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}
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toggle_mark(key);
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value_ = 0;
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redraw();
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} else {
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value(key);
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@ -622,6 +609,29 @@ SudokuCell::handle(int event) {
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return Fl_Widget::handle(event);
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}
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void SudokuCell::mark(int n, bool set) {
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if (n<1 || n>9) return;
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if (set) {
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marks_ |= (1<<n);
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} else {
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marks_ &= ~(1<<n);
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}
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}
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void SudokuCell::toggle_mark(int n) {
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if (n<1 || n>9) return;
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marks_ ^= (1<<n);
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}
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bool SudokuCell::mark(int n) {
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if (n<1 || n>9) return 0;
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return (marks_>>n) & 1;
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}
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void SudokuCell::clear_marks() {
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marks_ = 0;
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}
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// Sudoku class globals...
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Fl_Help_Dialog *Sudoku::help_dialog_ = (Fl_Help_Dialog *)0;
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@ -641,7 +651,7 @@ Sudoku::Sudoku()
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{ "&Check Game", FL_COMMAND | 'c', check_cb, 0, 0 },
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{ "&Restart Game", FL_COMMAND | 'r', restart_cb, 0, 0 },
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{ "&Solve Game", FL_COMMAND | 's', solve_cb, 0, FL_MENU_DIVIDER },
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{ "&Update Helpers", 0, update_helpers_cb, 0, 0 },
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{ "&Update Helpers", FL_COMMAND | 'u', update_helpers_cb, 0, 0 },
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{ "&Mute Sound", FL_COMMAND | 'm', mute_cb, 0, FL_MENU_TOGGLE | FL_MENU_DIVIDER },
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{ "&Quit", FL_COMMAND | 'q', close_cb, 0, 0 },
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{ 0 },
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@ -885,12 +895,12 @@ Sudoku::update_helpers() {
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int j, k, m;
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// First we delete any entries that the user may have made
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// TODO: set all marks if none were set
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// TODO: clear marks if value is used, don't set individual marks
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for (j = 0; j < 9; j ++) {
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for (k = 0; k < 9; k ++) {
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SudokuCell *cell = grid_cells_[j][k];
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for (m = 0; m < 8; m ++) {
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cell->test_value(0, m);
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}
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cell->clear_marks();
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}
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}
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@ -925,10 +935,11 @@ Sudoku::update_helpers() {
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}
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}
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// transfer our findings to the markers
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for (m = 1, k = 0; m <= 9; m ++) {
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for (m = 1; m <= 9; m ++) {
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if (!taken[m])
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dst_cell->test_value(m, k ++);
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dst_cell->mark(m, true);
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}
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dst_cell->redraw();
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}
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}
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@ -994,45 +1005,61 @@ Sudoku::help_cb(Fl_Widget *, void *) {
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// Load the game from saved preferences...
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void
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Sudoku::load_game() {
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#if 0
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for (int j = 0; j < 9; j ++) {
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Fl_Preferences row(prefs_, Fl_Preferences::Name("Row%d", j));
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for (int k = 0; k < 9; k ++) {
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Fl_Preferences p(row, Fl_Preferences::Name("Col%d", k));
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char name[255];
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SudokuCell *cell = grid_cells_[j][k];
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p.set("value", grid_values_[j][k]);
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p.set("state", cell->value());
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p.set("readonly", cell->readonly());
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for (int m = 1; m <= 9; m ++) {
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if (cell->mark(m))
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p.set(Fl_Preferences::Name("m%d", m), 1);
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else
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p.deleteEntry(Fl_Preferences::Name("m%d", m));
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}
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}
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}
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#endif
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// Load the current values and state of each grid...
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memset(grid_values_, 0, sizeof(grid_values_));
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bool solved = true;
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bool empty = false;
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for (int j = 0; j < 9; j ++)
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for (int j = 0; j < 9; j ++) {
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Fl_Preferences row(prefs_, Fl_Preferences::Name("Row%d", j));
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for (int k = 0; k < 9; k ++) {
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char name[255];
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int val;
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Fl_Preferences p(row, Fl_Preferences::Name("Col%d", k));
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int v;
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SudokuCell *cell = grid_cells_[j][k];
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snprintf(name, sizeof(name), "value%d.%d", j, k);
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if (!prefs_.get(name, val, 0)) {
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j = 9;
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grid_values_[0][0] = 0;
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break;
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}
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p.get("value", v, 0);
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grid_values_[j][k] = v;
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if (v) empty = false;
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grid_values_[j][k] = val;
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p.get("state", v, 0);
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cell->value(v);
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snprintf(name, sizeof(name), "state%d.%d", j, k);
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prefs_.get(name, val, 0);
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cell->value(val);
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snprintf(name, sizeof(name), "readonly%d.%d", j, k);
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prefs_.get(name, val, 0);
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cell->readonly(val != 0);
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if (val) cell->color(FL_GRAY);
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else {
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p.set("readonly", cell->readonly());
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cell->readonly(v != 0);
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if (v) {
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cell->color(FL_GRAY);
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} else {
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cell->color(FL_LIGHT3);
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solved = false;
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}
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for (int m = 0; m < 8; m ++) {
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snprintf(name, sizeof(name), "test%d%d.%d", m, j, k);
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prefs_.get(name, val, 0);
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cell->test_value(val, m);
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for (int m = 1; m <= 9; m ++) {
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p.get(Fl_Preferences::Name("m%d", m), v, 0);
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cell->mark(m, v);
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}
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cell->redraw();
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}
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}
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@ -1064,19 +1091,50 @@ void
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Sudoku::new_cb(Fl_Widget *widget, void *) {
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Sudoku *s = (Sudoku *)(widget->window() ? widget->window() : widget);
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if (s->grid_cells_[0][0]->color() != FL_GREEN) {
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if (!fl_choice("Are you sure you want to change the difficulty level and "
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"discard the current game?", "Keep Current Game", "Start New Game",
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NULL)) return;
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}
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// if (s->grid_cells_[0][0]->color() != FL_GREEN) {
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// if (!fl_choice("Are you sure you want to change the difficulty level and "
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// "discard the current game?", "Keep Current Game", "Start New Game",
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// NULL)) return;
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// }
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s->new_game(time(NULL));
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}
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extern int generate_sudoku(int grid_data[81]);
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// Create a new game...
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void
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Sudoku::new_game(time_t seed) {
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{
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int grid_data[81];
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int *g = grid_data;
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generate_sudoku(grid_data);
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SudokuCell *cell;
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for (int j = 0; j < 9; j ++) {
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for (int k = 0; k < 9; k ++) {
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int v = *g++;
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int vv = v; if (vv<0) vv = -vv;
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grid_values_[j][k] = vv;
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cell = grid_cells_[j][k];
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if (v<0) {
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cell->value(0);
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cell->readonly(0);
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cell->color(FL_LIGHT3);
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} else {
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cell->value(vv);
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cell->readonly(1);
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cell->color(FL_GRAY);
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}
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}
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}
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return;
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}
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int j, k, m, n, t, count;
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@ -1256,23 +1314,21 @@ Sudoku::restart_cb(Fl_Widget *widget, void *) {
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void
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Sudoku::save_game() {
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// Save the current values and state of each grid...
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for (int j = 0; j < 9; j ++)
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for (int j = 0; j < 9; j ++) {
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Fl_Preferences row(prefs_, Fl_Preferences::Name("Row%d", j));
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for (int k = 0; k < 9; k ++) {
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Fl_Preferences p(row, Fl_Preferences::Name("Col%d", k));
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char name[255];
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SudokuCell *cell = grid_cells_[j][k];
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snprintf(name, sizeof(name), "value%d.%d", j, k);
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prefs_.set(name, grid_values_[j][k]);
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snprintf(name, sizeof(name), "state%d.%d", j, k);
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prefs_.set(name, cell->value());
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snprintf(name, sizeof(name), "readonly%d.%d", j, k);
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prefs_.set(name, cell->readonly());
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for (int m = 0; m < 8; m ++) {
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snprintf(name, sizeof(name), "test%d%d.%d", m, j, k);
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prefs_.set(name, cell->test_value(m));
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p.set("value", grid_values_[j][k]);
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p.set("state", cell->value());
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p.set("readonly", cell->readonly());
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for (int m = 1; m <= 9; m ++) {
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if (cell->mark(m))
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p.set(Fl_Preferences::Name("m%d", m), 1);
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else
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p.deleteEntry(Fl_Preferences::Name("m%d", m));
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}
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}
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}
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}
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590
test/sudoku_generator.cpp
Normal file
590
test/sudoku_generator.cpp
Normal file
@ -0,0 +1,590 @@
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//
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// Sudoku game generator using the Fast Light Tool Kit (FLTK).
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//
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// Copyright (c) 2018 Vaibhav Thakkar.
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// Copyright 2023 by Vaibhav Thakkar and Matthias Melcher.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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//
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// This solver is based on the work of Vaibhav Thakkar
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// from https://github.com/vaithak/Sudoku-Generator
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// vaithak/Sudoku-Generator is licensed under the MIT License
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// Copyright (c) 2018 Vaibhav Thakkar
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//
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// The solver was modified to fit FLTKs requirements of using minimal C++
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// and adapted to the FLTK naming scheme.
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <FL/Fl_Int_Vector.H>
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#define UNASSIGNED 0
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class Sudoku_Generator {
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private:
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public:
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int grid[9][9];
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int solnGrid[9][9];
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int guessNum[9];
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int gridPos[81];
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int difficultyLevel;
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bool grid_status;
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public:
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Sudoku_Generator ();
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Sudoku_Generator(int[81], bool row_major=true);
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void fillEmptyDiagonalBox(int);
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void createSeed();
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void printGrid();
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bool solveGrid();
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void countSoln(int &number);
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void genPuzzle();
|
||||
bool gridStatus();
|
||||
void calculateDifficulty();
|
||||
int branchDifficultyScore();
|
||||
};
|
||||
|
||||
// Generate a random number between 0 and maxLimit-1
|
||||
int genRandNum(int maxLimit)
|
||||
{
|
||||
return rand()%maxLimit;
|
||||
}
|
||||
|
||||
|
||||
// We take an integer array of the length n and swap the content around randomly.
|
||||
// The function was part of the c++11 standard, but was removed in C++17 because
|
||||
// it was regarded as flawed.
|
||||
// This implementation is a minimal hack without care about random dstribution.
|
||||
// For additional randomness, we do that three times.
|
||||
void random_shuffle(int *data, int n, int (*r)(int))
|
||||
{
|
||||
for (int n = 3; n>0; --n) {
|
||||
for (int i = n-1; i > 0; --i) {
|
||||
int j = r(i+1);
|
||||
int tmp = data[i];
|
||||
data[i] = data[j];
|
||||
data[j] = tmp;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Helper functions for solving grid
|
||||
bool FindUnassignedLocation(int grid[9][9], int &row, int &col)
|
||||
{
|
||||
for (row = 0; row < 9; row++)
|
||||
{
|
||||
for (col = 0; col < 9; col++)
|
||||
{
|
||||
if (grid[row][col] == UNASSIGNED)
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
// Return true if num exists in row of grid.
|
||||
bool UsedInRow(int grid[9][9], int row, int num)
|
||||
{
|
||||
for (int col = 0; col < 9; col++)
|
||||
{
|
||||
if (grid[row][col] == num)
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
// Return true if num exists in col of grid.
|
||||
bool UsedInCol(int grid[9][9], int col, int num)
|
||||
{
|
||||
for (int row = 0; row < 9; row++)
|
||||
{
|
||||
if (grid[row][col] == num)
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
// Return true if num exists in box at row, col of grid.
|
||||
bool UsedInBox(int grid[9][9], int boxStartRow, int boxStartCol, int num)
|
||||
{
|
||||
for (int row = 0; row < 3; row++)
|
||||
{
|
||||
for (int col = 0; col < 3; col++)
|
||||
{
|
||||
if (grid[row+boxStartRow][col+boxStartCol] == num)
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
// Return true if a number can be used at row, col and does not appear
|
||||
// yet in the rom, column, or box
|
||||
bool isSafe(int grid[9][9], int row, int col, int num)
|
||||
{
|
||||
return !UsedInRow(grid, row, num) && !UsedInCol(grid, col, num) && !UsedInBox(grid, row - row%3 , col - col%3, num);
|
||||
}
|
||||
|
||||
// Fill the box at idx*3, idx*3 with random values
|
||||
void Sudoku_Generator::fillEmptyDiagonalBox(int idx)
|
||||
{
|
||||
int start = idx*3;
|
||||
random_shuffle(guessNum, 9, genRandNum);
|
||||
for (int i = 0; i < 3; ++i)
|
||||
{
|
||||
for (int j = 0; j < 3; ++j)
|
||||
{
|
||||
this->grid[start+i][start+j] = guessNum[i*3+j];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Create a soved Sudoku puzzle
|
||||
void Sudoku_Generator::createSeed()
|
||||
{
|
||||
/* Fill diagonal boxes to form:
|
||||
x | . | .
|
||||
. | x | .
|
||||
. | . | x
|
||||
*/
|
||||
this->fillEmptyDiagonalBox(0);
|
||||
this->fillEmptyDiagonalBox(1);
|
||||
this->fillEmptyDiagonalBox(2);
|
||||
|
||||
/* Fill the remaining blocks:
|
||||
x | x | x
|
||||
x | x | x
|
||||
x | x | x
|
||||
*/
|
||||
this->solveGrid(); // Not truly random, but still good enough because we generate random diagonals.
|
||||
|
||||
// Saving the solution grid
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
for(int j=0;j<9;j++)
|
||||
{
|
||||
this->solnGrid[i][j] = this->grid[i][j];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Initialize the egenrator
|
||||
Sudoku_Generator::Sudoku_Generator()
|
||||
{
|
||||
// initialize difficulty level
|
||||
this->difficultyLevel = 0;
|
||||
|
||||
// Randomly shuffling the array of removing grid positions
|
||||
for(int i=0;i<81;i++)
|
||||
{
|
||||
this->gridPos[i] = i;
|
||||
}
|
||||
|
||||
random_shuffle(gridPos, 81, genRandNum);
|
||||
|
||||
// Randomly shuffling the guessing number array
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
this->guessNum[i]=i+1;
|
||||
}
|
||||
|
||||
random_shuffle(guessNum, 9, genRandNum);
|
||||
|
||||
// Initialising the grid
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
for(int j=0;j<9;j++)
|
||||
{
|
||||
this->grid[i][j]=0;
|
||||
}
|
||||
}
|
||||
|
||||
grid_status = true;
|
||||
}
|
||||
|
||||
// Custom Initialising with grid passed as argument
|
||||
Sudoku_Generator::Sudoku_Generator(int grid_data[81], bool row_major)
|
||||
{
|
||||
// First pass: Check if all cells are valid
|
||||
for(int i=0; i<81; ++i)
|
||||
{
|
||||
int curr_num = grid_data[i];
|
||||
if(!((curr_num == UNASSIGNED) || (curr_num > 0 && curr_num < 10)))
|
||||
{
|
||||
grid_status=false;
|
||||
return;
|
||||
}
|
||||
|
||||
if(row_major) grid[i/9][i%9] = curr_num;
|
||||
else grid[i%9][i/9] = curr_num;
|
||||
}
|
||||
|
||||
// Second pass: Check if all columns are valid
|
||||
for (int col_num=0; col_num<9; ++col_num)
|
||||
{
|
||||
bool nums[10]={false};
|
||||
for (int row_num=0; row_num<9; ++row_num)
|
||||
{
|
||||
int curr_num = grid[row_num][col_num];
|
||||
if(curr_num!=UNASSIGNED && nums[curr_num]==true)
|
||||
{
|
||||
grid_status=false;
|
||||
return;
|
||||
}
|
||||
nums[curr_num] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Third pass: Check if all rows are valid
|
||||
for (int row_num=0; row_num<9; ++row_num)
|
||||
{
|
||||
bool nums[10]={false};
|
||||
for (int col_num=0; col_num<9; ++col_num)
|
||||
{
|
||||
int curr_num = grid[row_num][col_num];
|
||||
if(curr_num!=UNASSIGNED && nums[curr_num]==true)
|
||||
{
|
||||
grid_status=false;
|
||||
return;
|
||||
}
|
||||
nums[curr_num] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Fourth pass: Check if all blocks are valid
|
||||
for (int block_num=0; block_num<9; ++block_num)
|
||||
{
|
||||
bool nums[10]={false};
|
||||
for (int cell_num=0; cell_num<9; ++cell_num)
|
||||
{
|
||||
int curr_num = grid[((int)(block_num/3))*3 + (cell_num/3)][((int)(block_num%3))*3 + (cell_num%3)];
|
||||
if(curr_num!=UNASSIGNED && nums[curr_num]==true)
|
||||
{
|
||||
grid_status=false;
|
||||
return;
|
||||
}
|
||||
nums[curr_num] = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Randomly shuffling the guessing number array
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
this->guessNum[i]=i+1;
|
||||
}
|
||||
|
||||
random_shuffle(guessNum, 9, genRandNum);
|
||||
|
||||
grid_status = true;
|
||||
}
|
||||
|
||||
// Return status of the custom grid passed.
|
||||
bool Sudoku_Generator::gridStatus()
|
||||
{
|
||||
return grid_status;
|
||||
}
|
||||
|
||||
// Printing the grid
|
||||
void Sudoku_Generator::printGrid()
|
||||
{
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
for(int j=0;j<9;j++)
|
||||
{
|
||||
if(grid[i][j] == 0)
|
||||
printf(" .");
|
||||
else
|
||||
printf(" %d", grid[i][j]);
|
||||
if (((j%3) == 2) && (j < 8))
|
||||
printf(" |");
|
||||
}
|
||||
printf("\n");
|
||||
if (((i%3) == 2) && (i < 8))
|
||||
printf("-------+-------+-------\n");
|
||||
}
|
||||
printf("\nDifficulty of current sudoku(0 being easiest): %d\n", difficultyLevel);
|
||||
}
|
||||
|
||||
// Modified Sudoku solver
|
||||
bool Sudoku_Generator::solveGrid()
|
||||
{
|
||||
int row, col;
|
||||
|
||||
// If there is no unassigned location, we are done
|
||||
if (!FindUnassignedLocation(this->grid, row, col))
|
||||
return true; // success!
|
||||
|
||||
// Consider digits 1 to 9
|
||||
for (int num = 0; num < 9; num++)
|
||||
{
|
||||
// if looks promising
|
||||
if (isSafe(this->grid, row, col, this->guessNum[num]))
|
||||
{
|
||||
// make tentative assignment
|
||||
this->grid[row][col] = this->guessNum[num];
|
||||
|
||||
// return, if success, yay!
|
||||
if (solveGrid())
|
||||
return true;
|
||||
|
||||
// failure, unmake & try again
|
||||
this->grid[row][col] = UNASSIGNED;
|
||||
}
|
||||
}
|
||||
|
||||
return false; // this triggers backtracking
|
||||
}
|
||||
|
||||
// Check if the grid is uniquely solvable
|
||||
void Sudoku_Generator::countSoln(int &number)
|
||||
{
|
||||
int row, col;
|
||||
|
||||
if(!FindUnassignedLocation(this->grid, row, col))
|
||||
{
|
||||
number++;
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
for(int i=0;i<9 && number<2;i++)
|
||||
{
|
||||
if( isSafe(this->grid, row, col, this->guessNum[i]) )
|
||||
{
|
||||
this->grid[row][col] = this->guessNum[i];
|
||||
countSoln(number);
|
||||
}
|
||||
|
||||
this->grid[row][col] = UNASSIGNED;
|
||||
}
|
||||
|
||||
}
|
||||
// END: Check if the grid is uniquely solvable
|
||||
|
||||
|
||||
// START: Generate puzzle
|
||||
void Sudoku_Generator::genPuzzle()
|
||||
{
|
||||
for(int i=0;i<81;i++)
|
||||
{
|
||||
int x = (this->gridPos[i])/9;
|
||||
int y = (this->gridPos[i])%9;
|
||||
int temp = this->grid[x][y];
|
||||
this->grid[x][y] = UNASSIGNED;
|
||||
|
||||
// If now more than 1 solution , replace the removed cell back.
|
||||
int check=0;
|
||||
countSoln(check);
|
||||
if(check!=1)
|
||||
{
|
||||
this->grid[x][y] = temp;
|
||||
}
|
||||
}
|
||||
}
|
||||
// END: Generate puzzle
|
||||
|
||||
|
||||
// START: Calculate branch difficulty score
|
||||
int Sudoku_Generator::branchDifficultyScore()
|
||||
{
|
||||
int emptyPositions = -1;
|
||||
int tempGrid[9][9];
|
||||
int sum=0;
|
||||
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
for(int j=0;j<9;j++)
|
||||
{
|
||||
tempGrid[i][j] = this->grid[i][j];
|
||||
}
|
||||
}
|
||||
|
||||
while(emptyPositions!=0)
|
||||
{
|
||||
Fl_Int_Vector empty[81];
|
||||
int empty_n = 0;
|
||||
|
||||
for(int i=0;i<81;i++)
|
||||
{
|
||||
if(tempGrid[(int)(i/9)][(int)(i%9)] == 0)
|
||||
{
|
||||
// TODO: C++
|
||||
Fl_Int_Vector temp;
|
||||
temp.push_back(i);
|
||||
|
||||
for(int num=1;num<=9;num++)
|
||||
{
|
||||
if(isSafe(tempGrid,i/9,i%9,num))
|
||||
{
|
||||
temp.push_back(num);
|
||||
}
|
||||
}
|
||||
|
||||
empty[empty_n++] = temp;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
if(empty_n == 0)
|
||||
{
|
||||
return sum;
|
||||
}
|
||||
|
||||
int minIndex = 0;
|
||||
|
||||
int check = empty_n;
|
||||
for(int i=0;i<check;i++)
|
||||
{
|
||||
if(empty[i].size() < empty[minIndex].size())
|
||||
minIndex = i;
|
||||
}
|
||||
|
||||
int branchFactor=empty[minIndex].size();
|
||||
int rowIndex = empty[minIndex][0]/9;
|
||||
int colIndex = empty[minIndex][0]%9;
|
||||
|
||||
tempGrid[rowIndex][colIndex] = this->solnGrid[rowIndex][colIndex];
|
||||
sum = sum + ((branchFactor-2) * (branchFactor-2)) ;
|
||||
|
||||
emptyPositions = empty_n - 1;
|
||||
}
|
||||
|
||||
return sum;
|
||||
|
||||
}
|
||||
// END: Finish branch difficulty score
|
||||
|
||||
|
||||
// START: Calculate difficulty level of current grid
|
||||
void Sudoku_Generator::calculateDifficulty()
|
||||
{
|
||||
int B = branchDifficultyScore();
|
||||
int emptyCells = 0;
|
||||
|
||||
for(int i=0;i<9;i++)
|
||||
{
|
||||
for(int j=0;j<9;j++)
|
||||
{
|
||||
if(this->grid[i][j] == 0)
|
||||
emptyCells++;
|
||||
}
|
||||
}
|
||||
|
||||
this->difficultyLevel = B*100 + emptyCells;
|
||||
}
|
||||
// END: calculating difficulty level
|
||||
|
||||
|
||||
// START: The main function
|
||||
int generate_sudoku(int grid_data[81])
|
||||
{
|
||||
#if 0
|
||||
int i, j;
|
||||
FILE *f = fopen("/Users/matt/dev/su.cxx", "wb");
|
||||
fprintf(f, "// all horizontal chains\n");
|
||||
for (i=0; i<9; i++) {
|
||||
fprintf(f, "{ ");
|
||||
for (j=0; j<9; j++) {
|
||||
fprintf(f, "%2d, ", i*9+j);
|
||||
}
|
||||
fprintf(f, "},\n");
|
||||
}
|
||||
fprintf(f, "// all vertical chains\n");
|
||||
for (i=0; i<9; i++) {
|
||||
fprintf(f, "{ ");
|
||||
for (j=0; j<9; j++) {
|
||||
fprintf(f, "%2d, ", j*9+i);
|
||||
}
|
||||
fprintf(f, "},\n");
|
||||
}
|
||||
fprintf(f, "// all squares\n");
|
||||
for (i=0; i<9; i++) {
|
||||
fprintf(f, "{ ");
|
||||
for (j=0; j<9; j++) {
|
||||
fprintf(f, "%2d, ", ((i%3)*3) + ((i/3)*3*9) + (j%3) + (j/3)*9);
|
||||
}
|
||||
fprintf(f, "},\n");
|
||||
}
|
||||
fprintf(f, "// every field is part of 3 chains\n");
|
||||
for (i=0; i<81; i++) {
|
||||
fprintf(f, "{ ");
|
||||
int col = i % 9;
|
||||
int row = i / 9;
|
||||
fprintf(f, " %2d, %2d, %2d ",
|
||||
i/9, i%9, (col/3) + (row/3)*3
|
||||
);
|
||||
fprintf(f, "},\n");
|
||||
}
|
||||
fclose(f);
|
||||
#endif
|
||||
|
||||
|
||||
// Initialising seed for random number generation
|
||||
srand((unsigned int)time(NULL));
|
||||
|
||||
// Creating an instance of Sudoku
|
||||
Sudoku_Generator *puzzle = new Sudoku_Generator();
|
||||
|
||||
// Creating a seed for puzzle generation
|
||||
puzzle->createSeed();
|
||||
|
||||
// Generating the puzzle
|
||||
puzzle->genPuzzle();
|
||||
|
||||
// Calculating difficulty of puzzle
|
||||
puzzle->calculateDifficulty();
|
||||
|
||||
// testing by printing the grid
|
||||
puzzle->printGrid();
|
||||
|
||||
// // Printing the grid into SVG file
|
||||
// string rem = "sudokuGen";
|
||||
// string path = argv[0];
|
||||
// path = path.substr(0,path.size() - rem.size());
|
||||
// puzzle->printSVG(path);
|
||||
// cout<<"The above sudoku puzzle has been stored in puzzles.svg in current folder\n";
|
||||
// // freeing the memory
|
||||
|
||||
puzzle->printGrid();
|
||||
printf("Difficulty: %d\n", puzzle->difficultyLevel);
|
||||
for (int d = 0; d<9; d++) {
|
||||
int x = 0, y = 0;
|
||||
for (;;) {
|
||||
x = genRandNum(9);
|
||||
y = genRandNum(9);
|
||||
if (puzzle->grid[x][y] == 0) break;
|
||||
}
|
||||
puzzle->grid[x][y] = puzzle->solnGrid[x][y];
|
||||
printf(" %d %d\n", x, y);
|
||||
puzzle->calculateDifficulty();
|
||||
printf("Difficulty: %d\n", puzzle->difficultyLevel);
|
||||
}
|
||||
|
||||
int *g = grid_data;
|
||||
for(int i=0;i<9;i++) {
|
||||
for(int j=0;j<9;j++) {
|
||||
if (puzzle->grid[i][j] == UNASSIGNED) {
|
||||
*g++ = -puzzle->solnGrid[i][j];
|
||||
} else {
|
||||
*g++ = puzzle->solnGrid[i][j];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
delete puzzle;
|
||||
|
||||
return 0;
|
||||
}
|
||||
// END: The main function
|
||||
Loading…
Reference in New Issue
Block a user