c++用枚举值MON、TUE、WED、THU、FRI、SAT和SUN表示一个星期中的七天。键盘输入一个0~6的整数，根据输入的整数输出对应的英文缩写

在C++中，你可以通过枚举类型来定义一周的天数，并创建一个映射表将整数值转换成英文缩写。首先，定义枚举类型：

enum class DayOfWeek {
    MON = 0,
    TUE = 1,
    WED = 2,
    THU = 3,
    FRI = 4,
    SAT = 5,
    SUN = 6
};

然后，你可以创建一个辅助函数来进行整数到英文缩写的转换：

std::string dayOfWeekToString(DayOfWeek day) {
    switch (day) {
        case DayOfWeek::MON:
            return "MON";
        case DayOfWeek::TUE:
            return "TUE";
        case DayOfWeek::WED:
            return "WED";
        case DayOfWeek::THU:
            return "THU";
        case DayOfWeek::FRI:
            return "FRI";
        case DayOfWeek::SAT:
            return "SAT";
        case DayOfWeek::SUN:
            return "SUN";
        default:
            throw std::invalid_argument("Invalid day number");
    }
}

最后，用户输入并处理数据部分：

int inputDay;
std::cout << "Enter a day number from 0 to 6: ";
std::cin >> inputDay;

if (inputDay >= 0 && inputDay < 7) {
    DayOfWeek dayEnum = static_cast<DayOfWeek>(inputDay);
    std::cout << "The corresponding day is: " << dayOfWeekToString(dayEnum) << std::endl;
} else {
    std::cerr << "Invalid input! Please enter a number between 0 and 6." << std::endl;
}