3.10 枚举型常量

枚举型常量用enum来定义

enum num{zero,one,two,three,four};

例子：

#include<iostream>
using namespace std;
int main(){
    enum day
    {
        sunday,monday,tuesday,wednesday,thursday,friday,saturday
    };
    day today;
    today = monday;
    today = sunday;
    if (today == sunday || today == saturday){
        cout << "周末休息";
    }
    else{
        cout << "工作日";
    }
    return 0;
}