[OOP]重载算术操作符

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

class Fraction
{
public:
    Fraction(): num(1), den(1)
    {
    }
    Fraction(int n, int d) : num(n), den(d)
    {
    }

    // 重载加号操作符
    Fraction operator + (const Fraction& other)
    {
        Fraction result;
        result.den = den * other.den; // 分母相乘
        result.num = num*other.den + den * other.num; // 分子交叉相乘
        return result;
    }

public:
    int num;
    int den;
};

// 重载全局操作符
Fraction operator + (const Fraction& a, const Fraction& b)
{
    Fraction result;
    result.den = a.den * b.den; // 分母相乘
    result.num = a.num * b.den + a.den * b.num; // 分子交叉相乘
    return result;
}

int main()
{
    Fraction fa(2, 3);
    Fraction fb(3, 5);
    Fraction fc = fa + fb;

    return 0;
}