mirror of https://github.com/TheAlgorithms/C
86 lines
1.6 KiB
C
86 lines
1.6 KiB
C
// sorting of array list using bead sort
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
/*Displays the array, passed to this method*/
|
|
void display(int *arr, int n)
|
|
{
|
|
|
|
int i;
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
printf("%d ", arr[i]);
|
|
}
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
/*This is where the sorting of the array takes place
|
|
a --- Array to be sorted
|
|
len --- Array Size
|
|
*/
|
|
void bead_sort(int *a, int len)
|
|
{
|
|
int i, j, max, sum;
|
|
unsigned char *beads;
|
|
#define BEAD(i, j) beads[i * max + j]
|
|
|
|
for (i = 1, max = a[0]; i < len; i++)
|
|
if (a[i] > max)
|
|
max = a[i];
|
|
|
|
beads = calloc(1, max * len);
|
|
|
|
/* mark the beads */
|
|
for (i = 0; i < len; i++)
|
|
for (j = 0; j < a[i]; j++)
|
|
BEAD(i, j) = 1;
|
|
|
|
for (j = 0; j < max; j++)
|
|
{
|
|
/* count how many beads are on each post */
|
|
for (sum = i = 0; i < len; i++)
|
|
{
|
|
sum += BEAD(i, j);
|
|
BEAD(i, j) = 0;
|
|
}
|
|
/* mark bottom sum beads */
|
|
for (i = len - sum; i < len; i++)
|
|
BEAD(i, j) = 1;
|
|
}
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
for (j = 0; j < max && BEAD(i, j); j++)
|
|
;
|
|
a[i] = j;
|
|
}
|
|
free(beads);
|
|
}
|
|
|
|
int main(int argc, const char *argv[])
|
|
{
|
|
int n;
|
|
printf("Enter size of array:\n");
|
|
scanf("%d", &n); // E.g. 8 1 2 3
|
|
|
|
printf("Enter the elements of the array\n");
|
|
int i;
|
|
int *arr = (int *)malloc(n * sizeof(int));
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
scanf("%d", &arr[i]);
|
|
}
|
|
|
|
printf("Original array: ");
|
|
display(arr, n);
|
|
|
|
bead_sort(arr, n);
|
|
|
|
printf("Sorted array: ");
|
|
display(arr, n);
|
|
|
|
free(arr);
|
|
return 0;
|
|
}
|