分数类和整数的四则运算
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/** 程序的版权和版本声明部分* Copyright (c)2013, 烟台大学计算机学院学生* All rightsreserved.* 文件名称:score.cpp* 作 者: 赵 洋* 完成日期: 2013 年 03 月 28 日* 版本号: v1.0* 输入描述:已经在程序中初始化* 问题描述:分数处理* 输出:*/#include<iostream>using namespace std;int gcd(int m, int n);class CFraction{private:int nume; // 分子int deno; // 分母public:CFraction(int nu=0,int de=1); //构造函数,初始化用void set(int nu=0,int de=1); //置值,改变值时用void output(int style=0);void simplify();CFraction operator+(CFraction &c2);CFraction operator-(CFraction &c2);CFraction operator*(CFraction &c2);CFraction operator/(CFraction &c2);CFraction operator-(); //求反bool operator>(CFraction &c2);bool operator<(CFraction &c2);bool operator==(CFraction &c2);friend CFraction operator+(CFraction &c2,int &d);friend CFraction operator+(int &d,CFraction &c2);friend CFraction operator-(CFraction &c2,int &d);friend CFraction operator-(int &d,CFraction &c2);friend CFraction operator*(CFraction &c2,int &d);friend CFraction operator*(int &d,CFraction &c2);friend CFraction operator/(CFraction &c2,int &d);friend CFraction operator/(int &d,CFraction &c2);};CFraction::CFraction(int nu,int de) //构造函数,初始化用{if (de!=0){nume=nu;deno=de;}else{cerr<<"初始化中发生错误,程序退出\n";//system("pause");//exit(0);}}void CFraction::set(int nu,int de) //置值,改变值时用{if (de!=0) //如果不合适,改变值操作无效{nume=nu;deno=de;}}void CFraction::simplify(){int n=gcd(deno, nume);deno/=n; // 化简nume/=n;}// 求m,n的最大公约数int gcd(int m, int n) //这个函数可以定义为类的成员函数,也可以为一般函数{int r;if (m<n){r=m;m=n;n=r;}while(r==m%n) // 求m,n的最大公约数{m=n;n=r;}return n;}void CFraction::output(int style){int n;switch(style){case 0:cout<<"原样:" <<nume<<'/'<<deno<<endl;break;case 1:n=gcd(deno, nume);cout<<"化简形式: "<<nume/n<<'/'<<deno/n<<endl; //输出化简形式,并不是要化简break;case 2:cout<<"带分数形式:" <<nume/deno<<'('<<nume%deno<<'/'<<deno<<')'<<endl;break;case 3:cout<<"近似值:" <<nume/double(deno)<<endl;break;default:cout<<"默认原样:" <<nume<<'/'<<deno<<endl;}}CFraction CFraction::operator+(CFraction &c2){ return CFraction(nume*c2.deno+deno*c2.nume,deno*c2.deno);}CFraction CFraction::operator-(CFraction &c2){ return CFraction(nume*c2.deno-deno*c2.nume,deno*c2.deno);}CFraction CFraction::operator*(CFraction &c2){ return CFraction(nume*c2.nume,deno*c2.deno);}CFraction CFraction::operator/(CFraction &c2){ return CFraction(nume*c2.deno,deno*c2.nume);}CFraction CFraction::operator-(){ return CFraction(-nume,-deno);}bool CFraction::operator>(CFraction &c2){ if(nume*c2.deno>deno*c2.nume)return true; elsereturn false;}bool CFraction::operator<(CFraction &c2){ if(nume*c2.deno<deno*c2.nume)return true; elsereturn false;}bool CFraction::operator==(CFraction &c2){ if(nume*c2.deno==deno*c2.nume)return true; elsereturn false;}CFraction operator+(CFraction &c2,int &d){ return CFraction(c2.nume+d*c2.deno,c2.deno);}CFraction operator+(int &d,CFraction &c2){ return CFraction(c2.nume+d*c2.deno,c2.deno);}CFraction operator-(CFraction &c2,int &d){ return CFraction(c2.nume-d*c2.deno,c2.deno);}CFraction operator-(int &d,CFraction &c2){ return CFraction(d*c2.deno-c2.nume,c2.deno);}CFraction operator*(CFraction &c2,int &d){ return CFraction(d*c2.nume,c2.deno);}CFraction operator*(int &d,CFraction &c2){ return CFraction(d*c2.nume,c2.deno);}CFraction operator/(CFraction &c2,int &d){ return CFraction(c2.nume,c2.deno*d);}CFraction operator/(int &d,CFraction &c2){ return CFraction(d*c2.deno,c2.nume);}int main(){ CFraction c1(1,2),c2(2,3),c3; int d=2; cout<<"c1="; c1.output(); cout<<"c2="; c2.output(); cout<<"下面比较两个分数大小:\n";if (c1>c2) cout<<"c1>c2"<<endl;if (c1<c2) cout<<"c1<c2"<<endl;if (c1==c2) cout<<"c1=c2"<<endl;cout<<endl; c3=c1+c2; cout<<"c1+c2="; c3.output(); c3=c1-c2; cout<<"c1-c2="; c3.output(); c3=c1*c2; cout<<"c1*c2="; c3.output(); c3.output(1); c3=c1/c2; cout<<"c1/c2="; c3.output(); c3=-c1; cout<<"c1取反"; c3.output(); c3=d+c1; cout<<"d+c1="; c3.output(); c3=c1+d; cout<<"c1+d="; c3.output(); c3=d-c1; cout<<"d-c1="; c3.output(); c3=c1-d; cout<<"c1-d="; c3.output(); c3=d*c1; cout<<"d*c1="; c3.output(); c3=c1*d; cout<<"c1*d="; c3.output(); c3=d/c1; cout<<"d/c1="; c3.output(); c3=c1/d; cout<<"c1/d="; c3.output();return 0;}
运行结果:
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