C++ Program to find largest number using class

#include<iostream.h>
#include<conio.h>
class set
{
int m,n;
public:
 int largest();
 void input(void);
 void display();
};
int set::largest()
{
if(m>=n)
return(m);
else
return(n);
}
void set::input(void)
{
cout<<"Input the values of m and n:"<<m<<n<<endl;
cin>>m>>n;
}
void set::display()
{
cout<<"largest number is:"<<largest();
}
int main()
{
clrscr();
set A;
A.input();
A.display();
getch();
return 0;
}