C++_enum

C++的enum可以限制成员的类型

//error C2440: “=”: 无法从“int”转换为“color”

 1 #include <iostream>
 2 using namespace std;
 3
 4 enum color :char { red = ‘A‘, yellow, green, white };//限制为char类型
 5
 6 void main()
 7 {
 8     color mycolor(color::red);
 9
10     //mycolor = 1;//error C2440: “=”: 无法从“int”转换为“color”
11
12     //mycolor = ‘A‘;//error C2440: “=”: 无法从“char”转换为“color”
13
14     mycolor = color::white;
15
16     std::cout << red << " " << yellow << std::endl;//65 66
17
18     system("pause");
19 }