运算符超载? [英] Operator overloading?

问题描述

我已经使自己成为RSS读者，可以随时了解我的最新情况，并在新节目或不曾有过的最新消息方面通知我.

I've made myself a rss reader that keeps me up to date and informs me on new shows, or atleast thats the thought behind.

我制作了一个结构"SeasonEpisode"，其中包含两个整数(季节+集)和一个重写ToString函数.

I've made a struct "SeasonEpisode" that hold two ints (season+episode) and a override ToString function.

我将最新观看的内容存储在本地，然后从rss中读取最新的内容.但是我该如何比较SeasonEpisodes?现在，我将每个int进行比较

I store the latest watched locally and i then read whats the newest is from the rss. But how could I compare SeasonEpisodes? right now I take each of the ints and compare them

if( se1.Season >= se2.Season )
    if( se1.Episode > se2.Episode || se1.Season > se2.Season )
        // new episode!

我真正想要的是

if( se1 > se2 )
    // new episode

请问有什么需要吗?

推荐答案

有两种方法:

1. 实施 IComparable<T> 并使用CompareTo
2. 重载大于和小于运算符的内容

1. Implement IComparable<T> and use CompareTo
2. Overload the greater and less than operators

我建议您同时使用以下两种方式:

I suggest, you use both ways:

public class SeasonEpisode : IComparable<SeasonEpisode>
{
    public int CompareTo(SeasonEpisode other)
    {
        if(other == null)
            return 1;
        if(Season == other.Season)
        {
            if(Episode == other.Episode)
                return 0;
            else if(Episode < other.Episode)
                return -1;
            else
                return 1;
        }
        else if(Season < other.Season) 
            return -1;
        else
            return 1;
    }

    public static bool operator <(SeasonEpisode e1, SeasonEpisode e2) 
    {
        return e1.CompareTo(e2) < 0;
    }

    public static bool operator >(SeasonEpisode e1, SeasonEpisode e2) 
    {
        return e1.CompareTo(e2) > 0;
    }
}

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