Object Oriented Programming with C++, Second Edition

8.8 OPERATOR OVERLOADING WITH CLASS STRING

In Program 8.9, we have used method show() to display the string. In C++ we normally use operator ‘<<’ for displaying inbuilt data types. It will be a nice idea if this works with our class STRING as well. We have seen the principle of operator overloading. Let us apply it to this case!

Overloading insertion (<<) operator

Program: Write a program to overload “<<” operator for class STRING.

Solution: See Program 8.11.

 

Program 8.11 Overloading insertion (<<) operator

//    string3.cpp  #include<iostream.h>  class STRING  { private:      int len;      char a[80];   public:      STRING( char * p);      STRING();       int length();      friend ostream& operator<<(ostream & , STRING st) ;  };  int main() ...