分数类运算-优快云博客

本文链接：https://blog.youkuaiyun.com/qzshiyongjie123/article/details/7447436

本文介绍了一个简单的分数类(CFraction)的设计与实现，包括基本的算术运算如加减乘除、取反以及比较运算等，并展示了如何使用这个类来进行分数运算。

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* 程序头部注释开始* 程序的版权和版本声明部分

* 作者：时永杰

* 完成日期： 2012 年 4月 10日

* 版本号：v1.1

T3.h

class CFraction
{
private:
	int nume;  // 分子
	int deno;  // 分母
public:
	//构造函数及运算符重载的函数声明
	CFraction(){nume=1,deno=1;};
	CFraction(int n,int d):nume(n),deno(d){}
	void display();
	CFraction operator+(CFraction &c);
    CFraction operator -(CFraction &c);
    CFraction operator *(CFraction &c);
    CFraction operator /(CFraction &c);
    CFraction operator -();
	bool operator >(CFraction &c);
	bool  operator <(CFraction &c);
	bool  operator ==(CFraction &c);
	bool  operator >=(CFraction &c);
	bool  operator <=(CFraction &c);
	bool  operator !=(CFraction &c);
};

T3.main

#include <iostream>
#include "T3.h"
using namespace std;
int main()
{	CFraction c1(1,4),c2(2,5),c3;
	cout<<"c1=";
	c1.display();
	cout<<"c2=";
	c2.display();
	c3=c1+c2;
	cout<<"c1+c2=";
	c3.display();
	c3=c1-c2;
	cout<<"c1-c2=";
	c3.display();
	c3=-c1;
	cout<<"-c1=";
	c3.display();
	c3=c1*c2;
	cout<<"c1*c2=";
	c3.display();
	c3=c1/c2;
	cout<<"c1/c2=";
	c3.display();
	if (c1>c2) cout<<"c1>c2"<<endl;
	if (c1<c2) cout<<"c1<c2"<<endl;
	if (c1==c2) cout<<"c1＝c2"<<endl; 
	if (c1!=c2) cout<<"c1≠c2"<<endl;
	if (c1>=c2) cout<<"c1≥c2"<<endl;
	if (c1<=c2) cout<<"c1≤c2"<<endl;
	cout<<endl;

	system("pause");
	return 0;
}

T3.cpp

#include <iostream>
#include "T3.h"
using namespace std;
CFraction CFraction::operator +(CFraction &c)
{
	CFraction d;

	d.nume=nume*c.deno+deno*c.nume;
	d.deno=deno*c.deno;

	return d;
}
CFraction CFraction::operator -(CFraction &c)
{
	CFraction d;
	d.nume=nume*c.deno-deno*c.nume;
	d.deno=deno*c.deno;
	return d;
}
CFraction  CFraction::operator *(CFraction &c)
{
	CFraction d;
	d.nume=nume*c.nume;
	d.deno=deno*c.deno;
	return d;
}
CFraction CFraction::operator /(CFraction &c)
{
	CFraction d;
	d.nume=nume*c.deno;
	d.deno=deno*c.nume;
	return d;
}
CFraction CFraction::operator -()
{
	CFraction d;
	d.nume=-nume;
	d.deno=deno;
	return d;
}
bool CFraction::operator >(CFraction &c)
{
	if((nume*c.deno)/(c.nume*deno)>1)
		return true;
	else
		return false;
}
bool CFraction::operator <(CFraction &c)
{
	if((nume*c.deno)/(c.nume*deno)<1)
		return true;
	else
		return false;
}
bool CFraction::operator >=(CFraction &c)
{
	if((nume*c.deno)/(c.nume*deno)>=1)
		return true;
	else
		return false;
}
bool CFraction::operator <=(CFraction &c)
{
	if((nume*c.deno)/(c.nume*deno)<=1)
		return true;
	else
		return false;
}
bool CFraction::operator ==(CFraction &c)
{
	if((nume*c.deno)/(c.nume*deno)==1)
		return true;
	else
		return false;
}
bool CFraction::operator !=(CFraction &c)
{
	if ((nume*c.deno)/(c.nume*deno)!=1)
		return true;
	else
		return false;
}
void CFraction::display()
{
   int m,n;  
 
	if(nume<0)
	{
       n=-nume,m=deno; 
	   for(int i=2;n>=i;i++)   
       {  
           if(n%i==0 && m%i==0)  
         {  
           n/=i;  
           m/=i;  
           i--;         
         }  
        }
     cout<<-n<<"/"<<m<<endl;
	}
	else
	{
		n=nume,m=deno; 
	   for(int i=2;n>=i;i++)   
       {  
           if(n%i==0 && m%i==0)  
         {  
           n/=i;  
           m/=i;  
           i--;         
         }  
        }
     cout<<n<<"/"<<m<<endl;
	}

}