/*
* 程式的版權和版本宣告部分
* Copyright (c)2013, 煙臺大學計算機學院學生
* All rightsreserved.
* 檔名稱： object.cpp
* 作者：趙曉晨
* 完成日期： 2013年04月20日
* 版本號： v1.0
* 輸入描述：無
* 問題描述：無
* 程式輸出：無
*/
#include<iostream>
using namespace std;
class  CFraction
{
private:
    int nume;
    int deno;
public:
    CFraction(int n=1,int d=1):nume(n),deno(d){};
    CFraction  operator+(CFraction &c);
    CFraction  operator-(CFraction &c);
    CFraction  operator*(CFraction &c);
    CFraction  operator/(CFraction &c);
    CFraction  operator-();
    bool  operator>(CFraction &c);
    CFraction  simply(CFraction &c);
    friend int divisor(CFraction &c);
    friend int multiple(CFraction &c);
    void display();
};
//定義過載運算子+的函式
CFraction CFraction::operator+(CFraction &c)
{
      CFraction a;
     a.deno=deno*c.deno;
      a.nume=nume*c.deno+c.nume*deno;
      a=simply(a);
      return a;

  }
CFraction  CFraction::operator-(CFraction &c)
{
      CFraction a;
      a.deno=deno*c.deno;
      a.nume=nume*c.deno-c.nume*deno;
      a=simply(a);
      return a;
}
CFraction  CFraction::operator*(CFraction &c)
{
    CFraction a;
    a.deno=deno*c.deno;
    a.nume=nume*c.nume;
    a=simply(a);
      return a;
}
CFraction  CFraction::operator/(CFraction &c)
{
    CFraction a;
    a.nume=nume*c.deno;
    a.deno=deno*c.nume;
    a=simply(a);
      return a;
}
CFraction  CFraction::operator-()
{
     CFraction a;
    a.deno=nume;
    a.nume=deno;
    a=simply(a);
      return a;
}
bool CFraction::operator>(CFraction &c)
{
    if(nume/deno>c.nume/c.deno)
    return true;
    else
    return false;
}
CFraction  CFraction::simply(CFraction &c)
{
      CFraction a;
    int b=divisor(c);
    a.nume=c.nume/b;
    a.deno=c.deno/b;
    return a;
}
int divisor(CFraction &c)
{
     int n=min(c.deno,c.nume);
    for(int i=n;i>=0;i--)
    {
        if(c.deno%i==0 && c.nume%i==0)
        {
          return i;
          break;
        }
    }
}
void CFraction::display()
{

cout<<nume<<"/"<<deno<<endl;
}
//用main函式進行除錯
int main()
{
   CFraction t1(1,2),t2(3,4),t3,t4,t5;
  cout<<"t1+t2=";
   t3=t1+t2;
   t3.display();
   cout<<"t2-t1=";
   t3=t2-t1;
   t3.display();
   cout<<"t1*t2=";
   t3=t1*t2;
   t3.display();
   cout<<"t1/t2=";
   t3=t1/t2;
   t3.display();
   cout<<"去倒數";
   t3=-t1;
   t3.display();
   if(t1>t2){
  cout<<"t1>t2"<<endl;
   }else{
   cout<<"t1<t2"<<endl;
   }
  return 0;
}
 

結果：