Thread: How to printf a function

Hello, I want to enter 4 numbers and display the largest possible number. Can anybody help me with this please? I have tried multiply different approaches, so do not wonder why there are so many libraries. Thanks in advance

Code:

#include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <math.h>           //pow
    #include <limits.h>         //char max
    #include <ctype.h>          //


int sort_alg(const void *a, const void *b)
{
    char ab[32], ba[32];
    sprintf(ab, "%d%d", *(int*)a, *(int*)b);
    sprintf(ba, "%d%d", *(int*)b, *(int*)a);
    return strcmp(ba, ab);
}

void max_numb(int *a, int len)
{
    int i;
    qsort(a, len, sizeof(int), sort_alg); 
    for (i = 0; i < len; i++)
        printf("%d", a[i]);
    putchar('\n');
}

int main(void)
{
  int numbers[4];
  for(int count = 0; count < 4; count++)
  {
      scanf("%d", &numbers[count]);
      printf("%d", numbers);
  }

    max_numb(numbers, sizeof(numbers)/sizeof(numbers[0]));