709.cpp

C++实训教程

//709.CPP demo iostream
#include <iostream.h>

class Dim3
{
     int x,y,z;	// 3_d coordinates
   public:
     Dim3(int a,int b,int c)
     {  x=a;y=b;z=c;
     }
     friend ostream&  operator <<
		(ostream& stream,Dim3 obj);
     friend istream& operator >>
		(istream&stream,Dim3& obj);
};

// Display X,Y,Z coordinates-insertor
ostream& operator << (ostream& stream,Dim3 obj)
{
  stream << obj.x << " , ";
  stream << obj.y << " , ";
  stream << obj.z << endl;

  return stream;	// return the stream
}

// get three dimensional values-extractor
istream& operator >> (istream& stream,Dim3& obj)
{
  cout << "请输入x,y,z值: ";
  stream >> obj.x >> obj.y >> obj.z;

  return stream;
}

main(void)
{
  Dim3 d(1,2,3);
  cin >> d;
  cout << "d的数据为:" << d;
  return 0;
}
/*
请输入x,y,z值: 77 88 99
d的数据为:77 , 88 , 99

*/
/*
请输入x,y,z值: 77,88,99
d的数据为:77 , 2 , 3
*/