用运算符重载实现分数的加减乘除（c++实现）

爱被打了一巴掌 2022-02-19 07:41 174阅读 0赞

此程序运用c++程序中的运算符重载来做。

text.cpp
    #include<iostream>
    #include<iomanip>
    #include"Score.h"
    using namespace std;
    int main()
    {
    	Score a,b,c;
    	cout <<"输入三个分数" <<endl;
    	cin>>a;
    	cin>>b;
    	cin>>c;
    	a=a+b;
    	cout<<"a=a+b的值为：";
    	cout <<a<<endl;
    	a=a-b;
    	cout <<"a=a-b的值为："; 
    	cout <<a<<endl;
    	cout <<"b=b*c的值为："; 
    	b=c*b;
    	cout <<b<<endl;
    	cout <<"a=a/c的值为："; 
    	a=a/c;
    	cout <<a<<endl;
    }
    
    Srore.h
    #include<iostream>
    #ifndef SCORE_H
    #define SCORE_H
    using namespace std; 
    class Score
    {
    	friend ostream & operator<<(ostream&,     const Score &);
    	friend istream & operator>>(istream&,     Score &);
    	friend	Score operator+(Score x,Score y);
    	friend	Score operator-(Score x,Score y);
    	friend	Score operator*(Score x,Score y);
    	friend	Score operator/(Score x,Score y);
    	public:
    		Score(int m=0,int d=0);
    		~Score();
    	private: 
    	int mole;
    	int deno;
    };
    
    #endif
    
    Score.cpp
    #include "Score.h"
    #include<iostream>
    #include<iomanip>
    using namespace std;
    ostream& operator<<(ostream &output,    const Score &sco)
    {
    	output<< sco.mole << "/" << sco.deno;
    	return output; 
    }
    istream& operator>>(istream &input,    Score &sco)
    {
    	input>>sco.mole;
    	input.ignore(1);                                
    	input>>sco.deno;
    	return input;
    }
    Score::Score(int m,int d)
    {
    	mole=m;
    	deno=d;
    }
    Score operator+(Score x,Score y)
    {
    	int z;
    	int q;
    	if(x.deno==y.deno)
    	{
    		x.mole=x.mole+y.mole;
    	}
    	z=x.deno;
    	q=y.deno;
    	while(z%q!=0)
    	{
    		z=q;
    		q=z%q;
    	}
    	z=x.deno;
    	q=y.deno;
    	x.deno=x.deno*y.deno/q;
    	x.mole=x.mole*(x.deno/z)+y.mole*(x.mole/q);
    	return x;
    }
    Score operator-(Score x,Score y)
    {
    	int z;
    	int q;
    	if(x.deno==y.deno)
    	{
    		x.mole=x.mole-y.mole;
    	}
    	z=x.deno;
    	q=y.deno;
    	while(z%q!=0)
    	{
    		z=q;
    		q=z%q;
    	}
    	z=x.deno;
    	q=y.deno;
    	x.deno=x.deno*y.deno/q;
    	x.mole=x.mole*(x.deno/z)- y.mole*(x.mole/q);
    	return x;
    }
    Score operator*(Score x,Score y)
    {
    	x.mole=x.mole*y.mole;
    	x.deno=x.deno*y.deno;
    	return x;
    }
    Score 	operator/(Score x,Score y)
    {
    	int z=y.mole;
    	y.mole=y.deno;
    	y.deno=z;
    	x.mole=x.mole*y.mole;
    	x.deno=x.deno*y.deno;
    	return x;
    }
    Score::~Score()
    {
    }