C++枚舉類型enum實例代碼

枚舉類型的聲明如下：

enum 枚舉類型名 {變量值列表}；

e.g.  enum Weekday {SUN, MON, TUE, WEN, THU, FRI, SAT};

例題：某比賽結果有四種，（WIN, LOSE, TIE, CANCEL），利用枚舉類型變量順序輸出這四種情況 

分析：由於比賽結果只有4種可能，所以可以聲明一個枚舉類型，用一個枚舉類型的變量來存放比賽結果。

代碼：

#include <iostream>

using namespace std;

enum GameResult{WIN, LOSE, TIE, CANCEL};
int main()
{
   enum GameResult result;
   enum GameResult omit = CANCEL;                            //聲明變量時可以不寫關鍵字

   for (int count = WIN ; count <= CANCEL; count ++)        //隱含類型轉換
   {
       result = GameResult(count);                          //顯示類型轉換
       if(result==omit)
       {
           cout<<"This game was cancelled"<<endl;
       }
       else
       {
           cout<<"This game was played";
           if(result == WIN){
            cout<<"and we win!"<<endl;
           }
           else{
            cout<<"but we lost."<<endl;
           }
       }
   }
    return 0;
}

運行結果：

The game was played and we won!

The game was played and we lost.

The game was played

The game was cancelled