实验第三题



#include<iostream>
#include<string>
#include<math.h>
using namespace std;

class Location{
public:
 Location(double a,double b)
 {
  x=a;
  y=b;
 }
 double Getx()
 {
  return x;
 }
 double Gety()
 {
  return y;
 }
 double distance1 (Location&C)
 {
     int d1;
     d1=sqrt((x-C.Getx())*(x-C.Getx())+(y-C.Gety())*(y-C.Gety()));
     cout<<"Distance1="<<d1<<endl;
  return 0;
 }
 friend double distance2(Location &,Location &);

private:
 double x,y;
};

double distance2(Location &C,Location &D)
{
 int d2;
 d2=sqrt((C.Getx()-D.Getx())*(C.Getx()-D.Getx())+(C.Gety()-D.Gety())*(C.Gety()-D.Gety()));
 cout<<"distance2="<<d2<<endl;;
 return 0;
}

int main()
{
 Location A(-3,15);
 Location B(-3,6);
 cout<<"A("<<A.Getx()<<","<<A.Gety()<<") B("<<B.Getx()<<","<<B.Gety()<<")"<<endl;
 A.distance1(B);
 distance2(A,B);
 return 0;
}