Write A C++ Program For Incrementing And Decrementing Object Pointer.

#include <iostream.h> 
 #include<conio.h> 
       class myClass 
  { 
       int num; 
       public: 
       void set_num(int val) 
         { 
               num = val; 
         } 
       void show_num() 
         { 
               cout<< num << endl; 
          } 
 }; 
              void main() 
           { 
                     clrscr(); 
                     myClass ob[2], *objectPointer; 
                     ob[0].set_num(10); 
                     ob[1 ].set_num(20); 
                     objectPointer = &ob[0]; 
                     objectPointer->show_num(); 
                     objectPointer++; 
                     objectPointer->show_num(); 
                     objectPointer--; 
                     objectPointer->show_num(); 
                     getch(); 
            } 
 Output : 
 10 
 20 
 10