15-3.cpp

一、教学目的： 能理解C++中运算符重载的需要性

#include <iostream.h>

class Boat;

class Car
{
 public:
  Car(int j){size=j;}
  friend int Leisure(int time,Car& aobj,Boat& bobj);
 protect:
  int size;
};
class Boat
{
 public:
  Boat(int j){size=j;}
  friend int Leisure(int time,Car& aobj,Boat& bobj);
 protect:
  int size;
};
int Leisure(int time,Car& aobj,Boat& bobj)
{
 return time*aobj.size*bobj.size;
}
void main()
{
 Car c1(2);
 Boat b1(3);
 int itme=4;
 cout<<Leisure(time,c1,b1);
}