Enum Color2

base_code/enum.cpp:46–51

* @brief C++11的枚举类 * 下面等价于enum class Color2:int */

 * 下面等价于enum class Color2:int
 */
enum class Color2:int
{
    RED = 2,
    YELLOW,
    BLUE
};

enum class Color3:char;  // 前向声明