Programm to Read Garbage values & Set Values from RAM

#include 
main() {
    char *s;
    char *fun();
    s=fun();
    clrscr();
    printf("\nString is :%s",s);

/*    puts(s);  Prints Garbage */
}

char *fun() {
    char buffer[30];
    strcpy(buffer,"ROM - Read Only Memory");
    printf("\nbuffer: %s",buffer);
    return(buffer);
}