程序代码：

#include <stdio.h>
typedef struct
{
    int x;
    char c;
}good;

int main ()
{
    good *p,*q,x;
    x.x=4;
    p=&x;
    q=&x;
    if(*p=*q)
        printf("GOOD\n");
    else
        printf("BAD\n");
    return 0;
}