This code is fully written by me, so due to my noob-ness i request you to :
keep explore from expert for precise syntax,if it could please update me too!

 #include
 #include
 class A
 {
 public :
 int p;
 first()
 {
 p=100;
 cout<<p;
 }
 };
 void main()
 {
 clrscr();
 A x;
 x.first();
 getch();
 }