Mine

#include <stdio.h>void changeString( char * string );char * a;char * b;int main( void ) {        /* --- */        a = (char *)malloc( sizeof(char) * 30);        b = (char *)malloc( sizeof(char) * 30);        strcpy(a, "Hello, World!");        strcpy(b, "Goodbye, Cruel World!");        printf("%s\n", a);        printf("%s\n", b);        changeString(a);        printf("%s\n", a);        printf("%s\n", b);        /* --- */        return 0;}void changeString( char * string ) {        /* --- */        a=b;        /* --- */}