The Quicksort
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
void quickSortMain(char *items, int count);
void quickSort(char *items, int left, int right);
int main(void)
{
char s[255]="asdfasdfasdfasdfasdfasdfasdf";
quickSortMain(s, strlen(s));
printf("The sorted string is: %s.\n", s);
return 0;
}
void quickSortMain(char *items, int count)
{
quickSort(items, 0, count-1);
}
void quickSort(char *items, int left, int right)
{
int i, j;
char x, y;
i = left;
j = right;
x = items[(left+right)/2];
do {
while((items[i] < x) && (i < right))
i++;
while((x < items[j]) && (j > left))
j--;
if(i <= j) {
y = items[i];
items[i] = items[j];
items[j] = y;
i++; j--;
}
} while(i <= j);
if(i < right)
quickSort(items, i, right);
if(left < j)
quickSort(items, left, j);
}
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