#include<stdio.h>

void strcp(char *s1, char *s2);

int main() {

char *s1 = "Hi, I am a good boy";                   //1
char *s2 = "Really!! I am a good boy";                 //2

strcp(&s1,&s2);

printf("s1 = %s", s1);
printf("\ns2 = %s", s2);

return 0;
}

void strcp(char *s1, char *s2) {
    char *temp = *s1;
       *s1 = *s2;
       *s2 = temp;
}