Segmentation Fault during memory allocation

[bigmanutdfan7]

I am trying to program a code with memory allocation. I feel like the code is right and it compiles properly, however im hit with a segmentation fault when I try and run it. The following is my code and any help will be appreciated.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>
 
void pound(int argc, char*str)
{ 
  int i;
  i = 0;
    do {
      printf("Input Parameter= ##%s##\n",str);
      i = i + 1;
    } while (i < argc);
}
 
int 
main(int argc, char**argv)
{
  char *str;
  unsigned num;
 
  printf("Size of array = ");
  scanf("%d", num);
  str = (char *)malloc((size_t)num + 1);
  if (str == NULL)
    {
    printf("Can't allocate memory!");
    exit(0);
    }
  printf("Allocated array!");
  free(str);
 
  if (argc < 3) {
      printf("Error: You need to pass in atleast one argument.\n");
      exit(-1);
  }
  strncpy(str, argv[1], 99);
  printf("Input parameter = %s\n", str);
 
  int count = atol(argv[2]);
 
  pound(count, str);
}

[Markus]

On line 23, you're passing the value of num, not it's address.

[bigmanutdfan7]

Thanks a lot Markus. That fixed it perfectly.