考虑到整数长度为 4 字节，下面代码的输出结果是什么？

int main() { 
    intfoobar = 20, *foo, *bar; 
    foo = &foobar; /* Assume address of foobar is 2100*/ 
    bar = foo; 
    *foo++ = *bar++; 
    foobar++; 
    printf("foobar=%d, foo=%d, bar=%d\n", foobar, foo, bar); 
    return 0; 
}