#include<iostream.h>
#include<conio.h>
void f(int i=5,int j=10)
{
    cout<<"I = "<<i<<endl;
    cout<<"J = "<<j<<endl;
}

main()
{
    clrscr();
    int i=15,j=20;
    f();
    f(i);
    f(j);
    f(i,j);
}