Classes and objects

In the following program S1 and S2 are 2 objects are class students. Objects are used for operations:


class student //class student
{
private:
int roll;
public:
void setdata(int r) //member function to setdata
{roll=r;}
void showdata(); //member function to display data
{cout<<roll no. is= "<<roll<<endl;} //use printf(""); in C instead of cout<<;
};

void main()\
{
clrscr();

student s1,s2;              //define two objects of class student

s1.setdata(9); //call member function to set data
s2.setdata(10);

s1.showdata(); //call member function to display data
s2.showdata();
getch();
}