C++ language

#include<iostream.h>
Class A
{
int a,b;    
public :
void getdata()
{
cout<<"\n Enter the value of a and b";
cin>>a>>b;
}
void putdata()
{
cout<<"\n The value of a is :"<<a "and b is "<<b;
}
};
class B : public A
{
int c,d; 
public :
void intdata()
{
cout<<"\n Enter the value of c and d ";
cin>>c>>d;
}
void outdata()
{
cout<<"\n The value of c"<<c"and d is"<<d;
}
};
class C: public A
{
int e,f;
public :
void input()
{
cout<<"\n Enter the value of e and f";
cin>>e;>>f
}
void output()
{
cout<<"\nthe value  of e is"<<e"and f is" <<f;
}
void main()
{
B obj1
C obj2;
obj1.getdata(); //member function of class A
obj1.indata();  //member function of class B
obj2.getdata(); //member function of class A
obj2.input();   //member function of class C
obj1.putdata();  //member function of class A
obj1.outdata();  //member function of class B
obj2.output();   //member function of class A
obj2.outdata();  //member function of class C
}