enum week {
monday,
tuesday,
wednesday,
thursday,
friday,
saturday,
sunday
} day1;
day1 = monday;
enum week day2;
day2 = tuesday;
cout<<day1<<endl;
cout<<day2<<endl;
在声明枚举类型时需要使用enum，在创建实例时不需要使用enum关键字。
enum test {
a,
b=5,
c,
d,
e,
f,
g
};
enum test t1;
t1 = a;
enum test t2;
t2 = d;
cout<<t1<<endl;
cout<<t2<<ebdl;
运行结果：
0
7
枚举内的值如果为赋值的话是依次增加的。
