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求教高手 cmp函数

Posted by jyl890329 at 2012-04-05 09:03:22 on Problem 2031 and last updated at 2012-04-05 09:07:01
int cmp(const void *a, const void *b)
{
    return (*(edge *)a).len > (*(edge *)b).len; 
}

int cmp(const void *a, const void *b)
{
    return (*(edge *)a).len > (*(edge *)b).len ? 1 : -1;
}

这两种有区别吗,为什么我第一种是WA,第二种是AC呢?其它部分都一样啊。

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