class product
{
int a,b;
product( )//constructor for product
{
System.out.printin(“Default Constructor”);
a=10;
b=20;
}
void mul( );
{
System.out.println(“a*b=”+(a*b));
}
}
class product
{
public static void main(String args[])
{
//invoke the default constructor
product test =new product( );
test. sum( );
}
}