For example:

This is what I tried:

```
#include "stdafx.h"
#include <ctype.h>

char *mystrcat(char *s1p, char *s2p); 
char main(void)
{
    ...........................
}

char *mystrcat(char *s1p, char *s2p) 
{

    printf("whatever = %s%s\n", s1p, s2p);
    return 0;   
}

```

How do I make this work with the 3rd pointer and have it store `p1` and `p2`?