自己写的标准qsort

#include <stdio.h>

void qsort(int a[], int s, int e) {
if(s >= e) {
return;
}
int i = s, j = e, t = 0;
while (i < j) {
while (i < j && a[j] > a[s]) {
--j;
}
while (i < j && a[i] >= a[s]) {
++i;
}
t = a[i];
a[i] = a[j];
a[j] = t;
}
t = a[i];
a[i] = a[s];
a[s] = t;
qsort(a, s, i - 1);
qsort(a, i + 1, e);
}

#define NUM 10
int main(int argc, char **argv) {
int a[NUM] = {9, 2, 6, 3, 5, 0, 8, 7, 4, 1};
qsort(a, 0, NUM - 1);
for (size_t i = 0; i < NUM; ++i) {
fprintf(stdout, "%d ", a[i]);
}
fprintf(stdout, "\n");
}

//没有编译，如有写错请见谅。