rational_number.hpp

设计有理数类rational_number &#61656 数据成员： int numerator(分子) int denominator(分母) &#61656 成员函数 （

//程序：rational_number.hpp
//功能：定义有理数类rational_number的类界面，该类利用了运算符重载机制
class rational_number{
public:
	  rational_number();
	  rational_number(int x,int y);
	  rational_number(const rational_number& other);
      void normalize();//正规化函数(约分)
	  void print();
      rational_number operator +(const rational_number& other); 
      rational_number operator -(const rational_number& other); 
      rational_number operator *(const rational_number& other); 
      rational_number operator /(const rational_number& other);
protected:
	  int numerator;//分子
	  int denominator;//分母
};