《第八周实验三》实现分数类中的运算符重载。

/*  

实验内容:实现分数类中的运算符重载  

* 程序的版权和版本声明部分   

* Copyright (c) 2011, 烟台大学计算机学院学生   

* All rights reserved.   

* 文件名称： 实现分数类中的运算符重载                             

* 作    者：  张斌                              

* 完成日期：  2012       年  4    月  9      日   

* 版 本号：  8-3-1            

*/  

//【任务3】实现分数类中的运算符重载，在分数类中可以完成分数的加减乘除（运算后再化简）、求反、比较（6种关系）的运算。   

 

#include<iostream>using namespace std;class CFraction{private:int nume;  // 分子int deno;  // 分母int gcd(int nu, int de);public://构造函数及运算符重载的函数声明CFraction(int nu = 0, int de = 1):nume(nu), deno(de){};         //构造函数，初始化用 friend CFraction operator + (CFraction &c1,CFraction &c2);    friend CFraction operator - (CFraction &c1,CFraction &c2);friend CFraction operator * (CFraction &c1,CFraction &c2);friend CFraction operator / (CFraction &c1,CFraction &c2);    friend CFraction operator - (CFraction &c);bool operator > (CFraction &t);bool operator < (CFraction &t);bool operator >= (CFraction &t);bool operator <= (CFraction &t);bool operator == (CFraction &t);bool operator != (CFraction &t);void Simplify();                    //化简（使分子分母没有公因子）void display();};//重载函数的实现及用于测试的main()函数void CFraction::Simplify() {  int n ;if(nume < 0){n = gcd(-nume, deno);}else{n = gcd(nume, deno);}nume = nume / n;  deno = deno / n; }  int CFraction::gcd(int nu, int de)    {    int t, r, a, b;   a = nu;  b = de;  if (a < b)       {    t = a;    a = b;                                     b = t;    }     while (b != 0)    {    r = a % b;    a = b;    b = r;    }    return a;    }void CFraction::display(){cout << nume << "/" << deno << endl;}CFraction operator + (CFraction &c1,CFraction &c2){CFraction c;c.nume = c1.nume * c2.deno + c2.nume * c1.deno;c.deno = c1.deno * c2.deno;return c;}CFraction operator - (CFraction &c1,CFraction &c2){CFraction c;c.nume = c1.nume * c2.deno - c2.nume * c1.deno;c.deno = c1.deno * c2.deno;return c;}CFraction operator * (CFraction &c1,CFraction &c2){CFraction c;c.nume = c1.nume * c2.nume;c.deno = c1.deno * c2.deno;return c;}CFraction operator / (CFraction &c1,CFraction &c2){CFraction c;c.nume = c1.nume * c2.deno;c.deno = c1.deno * c2.nume;return c;}CFraction operator - (CFraction &c){c.nume = 0 - c.nume;return c;}bool CFraction::operator > (CFraction &t){if(nume * t.deno > t.nume * deno){return true;}else{return false;}}bool CFraction::operator < (CFraction &t){if(nume * t.deno < t.nume * deno){return true;}else{return false;}}bool CFraction::operator >= (CFraction &t){if(nume * t.deno >= t.nume * deno){return true;}else{return false;}}bool CFraction::operator <= (CFraction &t){if(nume * t.deno <= t.nume * deno){return true;}else{return false;}}bool CFraction::operator == (CFraction &t){if(nume * t.deno == t.nume * deno){return true;}else{return false;}}bool CFraction::operator != (CFraction &t){if(nume * t.deno != t.nume * deno){return true;}else{return false;}}void main(){CFraction c1(3, 5), c2(2, 3), c;cout << "c1 =" ;c1.Simplify();c1.display();cout << "c2 =" ;c2.Simplify();c2.display();c = c1 + c2;c.Simplify();cout << "c1 + c2 =";c.display();c = c1 - c2;c.Simplify();cout << "c1 - c2 =";c.display();c = c1 * c2;c.Simplify();cout << "c1 * c2 =";c.display();c = c1 / c2;c.Simplify();cout << "c1 / c2 =";c.display();c = - c1;cout << "-c1 =";c.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;}system("pause");}