[OOP]重载输入输出操作符

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

class Point
{
public:
    int x, y;
};

// 日志类
class Logger
{
public:
    Logger()
    {
    }

    Logger& operator << (int value)
    {
        printf("%d", value);
        return *this;
    }
    Logger& operator << (double value)
    {
        printf("%f", value);
        return *this;
    }
    Logger& operator << (const char* value)
    {
        printf("%s", value);
        return *this;
    }
    Logger& operator << (const Point& point)
    {
        printf("(%d,%d)", point.x, point.y);
        return *this;
    }

    Logger& Print(const char* value)
    {
        printf("%s", value);
        return *this;
    }
    Logger& Print(const Point& point)
    {
        printf("(%d,%d)", point.x, point.y);
        return *this;
    }
};

int main()
{
    Logger lg;


    Point pt;
    pt.x = 12;
    pt.y = 13;
    //lg << 1 << "," << 11.01 << "hello" << pt << "\n";


    lg.Print("hello").Print("world");
    return 0;
}