麻烦大家帮我优化一下程序

て看不见未来ぅ

#include<iostream.h>
#include<math.h>
class Location
  {
    public:
       Location(double a,double b)
    {
  x=a;
  y=b;
    }
       double Getx();
       double Gety();
       double distance(Location &);
    friend double distance (Location &b,Location &c);
       double x,y;
};
  double Location::Getx()
  {
   cin>>x;
return x;
  }
  double Location::Gety()
  {
   cin>>y;
return y;
  }
  double Location::distance(Location &b)
  {
   double d1,x1,y1;
  x1=(x-b.x);
  y1=(y-b.y);
  d1=sqrt(x1*x1+y1*y1);
  return d1;

  }
double distance (Location &b,Location &c)
  {
   double d2,x2,y2;
   x2=c.x-b.x;
   y2=c.y-b.y;
   d2=sqrt(x2*x2+y2*y2);
   return d2;

  }
int main()
{
double d1,d2;
Location A(0,0),B(0,0);
A.Getx();
A.Gety();
B.Getx();
B.Gety();
d1=A.distance(B);
d2=distance(A,B);
cout<<"A("<<A.x<<","<<A.y<<"),B("<<B.x<<","<<B.y<<")"<<endl;
cout<<"Distance1="<<d1<<endl;
cout<<"Distance2="<<d2<<endl;
return 0;
}
如果把double x ,y变成私有成员。该怎么修改主函数？

向往青莲

函数声明在类里

void Location::Outx();
void Location::Outy();

//函数定义
void Location::Outx()
  {
   cout>>x;
  }
  void Location::Outy()
  {
   cout>>y;
  }

将cout<<"A("<<A.x<<","<<A.y<<"),B("<<B.x<<","<<B.y<<")"<<endl;
改为cout<<"A("<<A.Outx<<","<<A.Outy<<"),B("<<B.Outx<<","<<B.Outy<<")"<<endl;

wangyexin

定义一个get方法和一个set方法