Rational类和移动语义不起作用

我试图在问题中为已经给定的类(答案为@Aak)添加更多功能: How to output fraction instead of decimal number? 用于在中打印分数 numerator / denominator .

首先,给定的代码在没有任何更改的情况下无法工作。然后我在做了一些更改后使其工作。然而,我的实现给了我一个错误的输出。

例如:

input: A = 3;
       B = 3;
Output: 9/1
        9
instead of: 1

以下是完整的实现:

#include <iostream>
/********************** Rational class **********************************/
class Rational
{
private:
    int m_numerator, m_denominator;
private:
    inline void simplificate()
    {
        int commondivisor = 1;
        for(int i=2;i<= std::min(abs(m_numerator), abs(m_denominator));i++)
            if( m_numerator%i == 0 && m_denominator%i == 0 )
                commondivisor = i;
        m_numerator /= commondivisor;
        m_denominator /= commondivisor;
    }

public:
    Rational()                                  // Defualt
        :m_numerator(1), m_denominator(1)
        {}

    Rational(const int& num, const int& den=1)  // Parameterized
        :m_numerator(num), m_denominator(den)
        {}

    Rational(const Rational& other)             // Copy
        :m_numerator(other.m_numerator), m_denominator(other.m_denominator)
        {}

    /*Rational(Rational&& other)                  // Move
        :m_numerator(other.m_numerator), m_denominator(other.m_denominator)
        {}*/

    ~Rational(){}

    Rational& operator/ (const int& divisor)
    {
            m_denominator *= divisor;
            simplificate();
            return *this;
    }
    Rational& operator/ (const Rational &divisor)
    {
            m_numerator *= divisor.m_numerator;
            m_denominator *= divisor.m_denominator;
            simplificate();
            return *this;
    }
    const double getrealformat()const
    {
        return  static_cast<double>(m_numerator)/
                static_cast<double>(m_denominator);
    }

    friend double operator/ (Rational& obj, const int& divisor);
    friend void printRational(Rational& obj, const int& A, const int& B);
    friend void printRational(Rational& obj, const int&& A, const int&& B);
};
/************************** Friend functions ********************************/
double operator/ (Rational& obj, const int& divisor)
{
    obj.m_denominator *= divisor;
    obj.simplificate();
    return obj.getrealformat();
}
void printRational(Rational& obj, const int& A, const int& B)   // lvalue
{
    Rational r1(A), r2(B);
    obj = r1/r2;
    std::cout<<obj.m_numerator<<'/'<<obj.m_denominator<<std::endl;
    std::cout<<obj.getrealformat()<<std::endl;
}
void printRational(Rational& obj, const int&& A, const int&& B)  // rvalue
{
    Rational r1(A), r2(B);
    obj = r1/r2;
    std::cout<<obj.m_numerator<<'/'<<obj.m_denominator<<std::endl;
    std::cout<<obj.getrealformat()<<std::endl;
}
/*****************************************************************************/
int main()
{
    Rational obj;
    printRational(obj, 3,3);
    return 0;
}

问题1:逻辑看起来不错,但我不知道为什么我得到了错误的答案。有人能找到问题吗?

问题2:我已经为这个类编写了“Move”构造函数,您可以在评论部分找到。但是,由于以下错误,我无法使用它:

D:\Programming\C++\CPP Programs\Class - Fractions\Class - Fractions.cpp|70|error: use of deleted function 'Rational& Rational::operator=(const Rational&)'|

D:\Programming\C++\CPP Programs\Class - Fractions\Class - Fractions.cpp|77|error: use of deleted function 'Rational& Rational::operator=(const Rational&)'|

(据我所知,无论何时调用,移动的对象/实例都会被销毁。)

有人能帮我实现这个类的Move构造函数吗?