#include <stdio.h>
#include <string.h>
int main() {
  char str1[100] = "This is ", str2[] = "programiz.com ", str3[]="Yes Yes !";

   /* concatenates str1 and str2*/
   /* the resultant string is stored in str1.*/
   strcat(str1, str2);
   strcat(str1, str3);

   puts(str1);
   puts(str2);
   puts(str3);

   return 0;
}