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< div class = "headertitle" > < div class = "title" > sol2.c File Reference< / div > < / div >
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< p > < a href = "https://projecteuler.net/problem=10" target = "_blank" > Problem 10< / a > solution
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< a href = "#details" > More...< / a > < / p >
< div class = "textblock" > < code > #include < math.h> < / code > < br / >
< code > #include < stdio.h> < / code > < br / >
< code > #include < stdlib.h> < / code > < br / >
< / div > < div class = "textblock" > < div class = "dynheader" >
Include dependency graph for sol2.c:< / div >
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< div class = "center" > < iframe scrolling = "no" frameborder = "0" src = "../../d7/ded/problem__10_2sol2_8c__incl.svg" width = "244" height = "126" > < p > < b > This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.< / b > < / p > < / iframe > < / div >
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Functions< / h2 > < / td > < / tr >
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< tr class = "memitem:a0ddf1224851353fc92bfbff6f499fa97" id = "r_a0ddf1224851353fc92bfbff6f499fa97" > < td class = "memItemLeft" align = "right" valign = "top" > int  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d9/da7/problem__10_2sol2_8c.html#a0ddf1224851353fc92bfbff6f499fa97" > main< / a > (int argc, char *argv[])< / td > < / tr >
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< tr class = "memdesc:a0ddf1224851353fc92bfbff6f499fa97" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Main function. < br / > < / td > < / tr >
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< tr class = "separator:a0ddf1224851353fc92bfbff6f499fa97" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table >
< a name = "details" id = "details" > < / a > < h2 class = "groupheader" > Detailed Description< / h2 >
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< div class = "textblock" > < p > < a href = "https://projecteuler.net/problem=10" target = "_blank" > Problem 10< / a > solution < / p >
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< dl class = "section author" > < dt > Author< / dt > < dd > < a href = "https://github.com/kvedala" target = "_blank" > Krishna Vedala< / a > < / dd > < / dl >
< / div > < h2 class = "groupheader" > Function Documentation< / h2 >
< a id = "a0ddf1224851353fc92bfbff6f499fa97" name = "a0ddf1224851353fc92bfbff6f499fa97" > < / a >
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< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a0ddf1224851353fc92bfbff6f499fa97" > ◆   < / a > < / span > main()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > int main < / td >
< td > (< / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > argc< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > char *  < / td >
< td class = "paramname" > < em > argv< / em > []  < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Main function. < / p >
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< div class = "fragment" > < div class = "line" > < span class = "lineno" > 12< / span > {< / div >
< div class = "line" > < span class = "lineno" > 13< / span > < span class = "keywordtype" > long< / span > n = 100;< / div >
< div class = "line" > < span class = "lineno" > 14< / span > < span class = "keywordtype" > long< / span > < span class = "keywordtype" > long< / span > sum = 0;< / div >
< div class = "line" > < span class = "lineno" > 15< / span > < span class = "keywordtype" > char< / span > *sieve = NULL;< / div >
< div class = "line" > < span class = "lineno" > 16< / span > < / div >
< div class = "line" > < span class = "lineno" > 17< / span > < span class = "keywordflow" > if< / span > (argc == 2) < span class = "comment" > /* if command line argument is provided */< / span > < / div >
< div class = "line" > < span class = "lineno" > 18< / span > n = atol(argv[1]); < span class = "comment" > /* use that as the upper limit */< / span > < / div >
< div class = "line" > < span class = "lineno" > 19< / span > < / div >
< div class = "line" > < span class = "lineno" > 20< / span > < span class = "comment" > /* allocate memory for the sieve */< / span > < / div >
< div class = "line" > < span class = "lineno" > 21< / span > sieve = < a class = "code hl_define" href = "../../d2/ddd/malloc__dbg_8h.html#afdddaa949a93c1ef559a638e98f9c21b" > calloc< / a > (n, < span class = "keyword" > sizeof< / span > (*sieve));< / div >
< div class = "line" > < span class = "lineno" > 22< / span > < span class = "keywordflow" > if< / span > (!sieve)< / div >
< div class = "line" > < span class = "lineno" > 23< / span > {< / div >
< div class = "line" > < span class = "lineno" > 24< / span > perror(< span class = "stringliteral" > " Unable to allocate memory!" < / span > );< / div >
< div class = "line" > < span class = "lineno" > 25< / span > < span class = "keywordflow" > return< / span > -1;< / div >
< div class = "line" > < span class = "lineno" > 26< / span > }< / div >
< div class = "line" > < span class = "lineno" > 27< / span > < / div >
< div class = "line" > < span class = "lineno" > 28< / span > < span class = "comment" > /* build sieve of Eratosthenes< / span > < / div >
< div class = "line" > < span class = "lineno" > 29< / span > < span class = "comment" > In the array,< / span > < / div >
< div class = "line" > < span class = "lineno" > 30< / span > < span class = "comment" > * if i^th cell is ' 1' , then ' i' is composite< / span > < / div >
< div class = "line" > < span class = "lineno" > 31< / span > < span class = "comment" > * if i^th cell is ' 0' , then ' i' is prime< / span > < / div >
< div class = "line" > < span class = "lineno" > 32< / span > < span class = "comment" > */< / span > < / div >
< div class = "line" > < span class = "lineno" > 33< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > i = 2; i < sqrtl(n); i++)< / div >
< div class = "line" > < span class = "lineno" > 34< / span > {< / div >
< div class = "line" > < span class = "lineno" > 35< / span > < span class = "comment" > /* if i^th element is prime, mark all its multiples< / span > < / div >
< div class = "line" > < span class = "lineno" > 36< / span > < span class = "comment" > as composites */< / span > < / div >
< div class = "line" > < span class = "lineno" > 37< / span > < span class = "keywordflow" > if< / span > (!sieve[i])< / div >
< div class = "line" > < span class = "lineno" > 38< / span > {< / div >
< div class = "line" > < span class = "lineno" > 39< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > j = i * i; j < n + 1; j += i)< / div >
< div class = "line" > < span class = "lineno" > 40< / span > {< / div >
< div class = "line" > < span class = "lineno" > 41< / span > sieve[j] = 1;< / div >
< div class = "line" > < span class = "lineno" > 42< / span > }< / div >
< div class = "line" > < span class = "lineno" > 43< / span > sum += i;< / div >
< div class = "line" > < span class = "lineno" > 44< / span > }< / div >
< div class = "line" > < span class = "lineno" > 45< / span > }< / div >
< div class = "line" > < span class = "lineno" > 46< / span > < / div >
< div class = "line" > < span class = "lineno" > 47< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > i = sqrtl(n) + 1; i < n; i++)< / div >
< div class = "line" > < span class = "lineno" > 48< / span > < span class = "keywordflow" > if< / span > (!sieve[i])< / div >
< div class = "line" > < span class = "lineno" > 49< / span > sum += i;< / div >
< div class = "line" > < span class = "lineno" > 50< / span > < / div >
< div class = "line" > < span class = "lineno" > 51< / span > < a class = "code hl_define" href = "../../d2/ddd/malloc__dbg_8h.html#a9cc854374299a1dd933bf62029761768" > free< / a > (sieve);< / div >
< div class = "line" > < span class = "lineno" > 52< / span > < / div >
< div class = "line" > < span class = "lineno" > 53< / span > printf(< span class = "stringliteral" > " %ld: %lld\n" < / span > , n, sum);< / div >
< div class = "line" > < span class = "lineno" > 54< / span > < / div >
< div class = "line" > < span class = "lineno" > 55< / span > < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < span class = "lineno" > 56< / span > }< / div >
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< div class = "ttc" id = "amalloc__dbg_8h_html_a9cc854374299a1dd933bf62029761768" > < div class = "ttname" > < a href = "../../d2/ddd/malloc__dbg_8h.html#a9cc854374299a1dd933bf62029761768" > free< / a > < / div > < div class = "ttdeci" > #define free(ptr)< / div > < div class = "ttdoc" > This macro replace the standard free function with free_dbg.< / div > < div class = "ttdef" > < b > Definition< / b > malloc_dbg.h:26< / div > < / div >
< div class = "ttc" id = "amalloc__dbg_8h_html_afdddaa949a93c1ef559a638e98f9c21b" > < div class = "ttname" > < a href = "../../d2/ddd/malloc__dbg_8h.html#afdddaa949a93c1ef559a638e98f9c21b" > calloc< / a > < / div > < div class = "ttdeci" > #define calloc(elemCount, elemSize)< / div > < div class = "ttdoc" > This macro replace the standard calloc function with calloc_dbg.< / div > < div class = "ttdef" > < b > Definition< / b > malloc_dbg.h:22< / div > < / div >
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< li class = "navelem" > < a class = "el" href = "../../dir_b3d331eabd4234f247030c297aaf021c.html" > project_euler< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_16b947d8e9a05fe119d0675493324331.html" > problem_10< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../d9/da7/problem__10_2sol2_8c.html" > sol2.c< / a > < / li >
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