Back To C++ Classes

//program to demonstrate example of nested class (which means class within a class) , class student contains a class marks
#include<iostream.h>
#include<conio.h>
class marks
{
	int physics;
	int maths;
	int chemistry;
public:
	void getmarks()
	{
		cout<<"\nenter marks in physics ";
		cin>>physics;
		cout<<"\nenter marks in maths ";
		cin>>maths;
		cout<<"\nenter marks in chemistry ";
		cin>>chemistry;
	}
	void showmarks()
	{
		cout<<"\nmarks in physics are "<<physics;
		cout<<"\nmarks in maths are "<<maths;
		cout<<"\nmarks in chemistry are "<<chemistry;

}
};
class student
{
	int rollno;
	char name[20];
	int clas;
	marks m;
public :
	void getdata()
	{
		cout<<"\nenter rollno of student ";
		cin>>rollno;
		cout<<"\nenter name of student ";
		cin>>name;
		cout<<"\nenter class of student ";
		cin>>clas;
		m.getmarks();
	}
	void showdata()
	{
		cout<<"\nrollno of student is "<<rollno;
		cout<<"\nname of student is "<<name;
		cout<<"\nclass of student is "<<clas;
		m.showmarks();
	}
};
void main()
{
	student ob;
        clrscr();
	ob.getdata();
	ob.showdata();
	getch();
}