qsort function

[winsonlee]

#include <stdlib.h>
#include <stdio.h>
#include <string.h>


int comp_nums(const int *num1, const int *num2)
{
  if (*num1 <  *num2) return -1;
  if (*num1 == *num2) return  0;
  if (*num1 >  *num2) return  1;
}


int main(){
char numbers[] = "afbdc";

  qsort(numbers,5,sizeof(int),(void *)comp_nums);
printf("%s\n", numbers);


}

i would like to know whats wrong with my code ?? Why cant i sort the following string as "abcdf" and print it out?? which part did i do wrong ???

[quzah]

You're calling the function wrong, you're ignoring your compiler's warnings, and most importantly, you're telling it the items are all a different size than they really are:

#include <stdlib.h>
#include <stdio.h>

int comp_nums(const void *num1, const void *num2)
{
    return (*((const char*)num1)<*((const char*)num2)?-1
           :*((const char*)num1)>*((const char*)num2)?1
           :0);
}


int main()
{
    char numbers[] = "afbdc";

    qsort(numbers,5,sizeof(char),comp_nums);
    printf("%s\n", numbers);
    return 0;
}

Quzah.