Nesting of Member Functions

A member function of a class can be called only by an object of that class using a dot operator. However, there is an exception to this. A member function can be called by using its name inside another member function of the same class. This is known as nesting of member functions.

Nesting of Member Function
#include
using namespace std;
class set
{
int m,n;
public:
void input(void);
void display(void);
void largest(void);
};
int set :: largest(void)
{
if(m >= n)
return(m);
else
return(n);
}
void set :: input(void)
{
cout << "Input value of m and n"<<"\n";
cin >> m>>n;
}
void set :: display(void)
{
cout << "largest value=" << largest() <<"\n";
}

int main()
{
set A;
A.input();
A.display();

return 0;
}

The output of program would be:
Input value of m and n
25 18
Largest value=25