Overload inserter and extractor to output the coordinates and read the coordinates. - C++ Class

C++ examples for Class:Operator Overload

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Description

Overload inserter and extractor to output the coordinates and read the coordinates.

Demo Code

#include <iostream>
using namespace std;
class Box {//from  w w w.  jav  a 2s . com
   int x, y, z; // 3-D coordinates
   public:
   Box(int a, int b, int c) { x = a; y = b; z = c; }
   // Make the inserter and extractor friends of Box.
   friend ostream &operator<<(ostream &stream, const Box &obj);
   friend istream &operator>>(istream &stream, Box &obj);
   // ...
};
// Box inserter. Display the X, Y, Z coordinates.
ostream &operator<<(ostream &stream, const Box &obj)
{
   stream << obj.x << ", ";
   stream << obj.y << ", ";
   stream << obj.z << "\n";
   return stream;  // return the stream
}
// Box extractor. Get three-dimensional values.
istream &operator>>(istream &stream, Box &obj)
{
   stream >> obj.x >> obj.y >> obj.z;
   return stream;
}
int main()
{
   Box td(1, 2, 3);
   cout << "The coordinates in td: " << td << endl;
   cout << "Enter new three-d coordinates: ";
   cin >> td;
   cout << "The coordinates in td are now: " << td << endl;
   return 0;
}

Result


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