木之夏  
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不限定作用域的枚举类型

 

注意:枚举类型为常量不可再进行赋值,也就是说需要在初始的时候对其赋值

当然也可以在初始话的时候对其赋值,不使用默认的赋值方式;

如: 

    enum weekday {sunday=7,monday=1,tuesday,wednesday,thursday,friday,saturday }; 

 

 

枚举类型可以给整型赋值,因为枚举类型是整型的子集,但是整型若想给枚举类型赋值需要进行类型转换。

 

代码实例:

#include <iostream>
using namespace std;

int main()
{
    //定义枚举类型
    enum weekday {sunday,monday,tuesday,wednesday,thursday,friday,saturday };
   // 声明枚举变量
    weekday tomorrow;
    //声明并赋值
    enum weekday goalDay = monday;

    cout <<"直接输出goalDay的值为:" << goalDay <<"\n";
    //将int 赋值给枚举
    tomorrow = weekday(1);
    //将枚举类型赋值给整型 
    int daynum = monday;
    if (tomorrow == goalDay)
        cout << "tomorrow = goalday,and  the day num ="<< daynum;

    return 0;
}

运行结果;

直接输出goalDay的值为:1
tomorrow = goalday,and the day num =1

posted on 2021-02-13 13:37  木之夏  阅读(428)  评论(0编辑  收藏  举报