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

int main()
{
   /*
   char a1[5], a2[5];
   a1 = a2;
   */


   char *a1, *a2;
   a1 = (char *) malloc(5 * sizeof(char));
   a2 = (char *) malloc(5 * sizeof(char));

   a1 = a2;

   free(a1);
   free(a2);

   return 0;
}