Write A C++ Program To Declare Const Member Function And Attempt Any Operation Within It.

# include <iostream.h> 
 # include <conio.h> 
 class A 
 { 
      int c; 
      public: 
                  void add (int a, int b) const 
              { 
                        // c=a+b; // invalid statement. Can't modify any data in const Function 
                  a+b; 
                  cout<<"a + b = "<<_AX; 
              } 
 }; 
            void main ( ) 
      { 
            clrscr ( ); 
            A a; 
            a.add (2, 4); 
            getch(); 
       } 
 Output : 
 a + b = 6