c++枚举类未正确显示

Question

代码如下:

#include "stdafx.h"
#define _USE_MATH_DEFINES
#include <cmath>
#include <iostream>
#include <iomanip>


enum Suit : long {Heart, Club, Spade, Diamond};
enum class Color : char {Red = '*', Blue, Yellow, Green};
int main(int argc, wchar_t* argv[])
{
    using namespace std;
    auto suit = Suit::Club; 
    auto color = Color::Yellow;
    cout << setw(37) << left << "Suit value: " << setw(5) << right << suit << endl;
    cout << setw(37) << left << "Suit value +10: " << setw(5) << right << suit + 10 << endl;
    cout << setw(37) << left << "Color value: " << setw(5) << right << static_cast< char >(color) << endl;
    cout << setw(37) << left << "Color value +10: " << setw(5) << right << static_cast< int >(color) << endl;

    wchar_t x;
    wcin >> x;
    return 0;
}

vs2017运行结果:

Suit value:                              1
Suit value +10:                         11
Color value:                             ,
Color value +10:                        44

所以 char * 被打印为逗号，为什么？

Answer 1

红色是'*'，黄色是'*' + 2，即','.

更具体地说，42 是 '*' 的 ASCII 值，44 是 ','，Red 和 黄色 相差 2。