分数的加减乘除及化简c++

#include 
using namespace std;
class rationalNumber
{
      public:
             void simplify（）
             {
                          int i;int j;
                          int r;
                          i=num;
                          j=den;
                          while（j!=0）
                          {
                                     r=j;
                                     j=i%j;
                                     i=r;
                                     }
                          num=num/i;
                          den=den/i;                         
                          }
             rationalNumber（int nuint de）
             {
                                    num=nu;
                                    den=de;