i can not understanding the error of this program
interface Test
{
void show();
void input();
void square();
}
class Run implements Test
{
int a,b,c;
void show()
{
System.out.println("a = " + a);
System.out.println("b = " + b);
System.out.println("c = " + c);
}
void input()
{
a=2;
b=3;
c=4;
}
void square()
{
System.out.println("a = " + a*a);
System.out.println("b = " + b*b);
System.out.println("c = " + c*c);
}
}
class Interface
{
public static void main(String s[])
{
Ruu obj=new Run();
obj.input();
obj.show();
obj.square();
obj.show();
}
}