main.cpp

来自「C++ Source code from a tutorial」· C++ 代码 · 共 50 行

#include <iostream>
#include <stdlib.h>
#include <string>

using namespace std;

class Colors {
public:
    enum ColorEnum {blue, red, green, yellow, black};
    Colors(Colors::ColorEnum value);
    string AsString();
protected:
   ColorEnum value; 
};

Colors::Colors(Colors::ColorEnum initvalue) {
    value = initvalue;
}

ostream& operator << (ostream& out, Colors& inst) {
    out << inst.AsString();
    return out;
}


string Colors::AsString() {
    switch (value) {
    case blue:
        return "blue";
    case red:
        return "red";
    case green:
        return "green";
    case yellow:
        return "yellow";
    case black:
        return "black";
    }
}

int main(int argc, char *argv[])
{
    Colors InkColor = Colors::red;
    cout << InkColor << endl;
    system("PAUSE");	
    return 0;
}