11.9  定义分数类Rational......

1 #include
      
        2 #include
       
         3 class Rational{ 4 private: 5     int fm,fz; 6     int getZdgys(int a,int b); 7 public: 8     Rational(){ 9         fm=1;fz=0;10     }11     Rational(int a,int b);12     friend Rational Add(Rational r1,Rational r2);13     friend Rational Sub(Rational r1,Rational r2);14     void Print1();15     void Print2();16 };17 18 Rational::Rational(int fm1,int fz1)19 {20     int t=getZdgys(fm1,fz1);21     fm=fm1/t;22     fz=fz1/t;23 }24 25 void Rational::Print1()26 {27     cout<
        
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