This simple program which explain about access specifiers

#include<iostream.h>
class number{
private:
int a;
public:
int b;
protected:
int c;
public:
void getData()
{
cout<<"Get a,b,c";
cin>>a>>b>>c;
}
void putData()
{
cout<<"A="<<a"\t"<<"B="<<b<<"\t";
cout<<"C="<<c<<"\n";
}
};
void main()
{
number N;
N.a=100;
N.b=200;
N.c=300;
N.getData();
N.putData();
}