哪为好心人帮我看一下问题出在哪里?谢了
class A
{
public int x,y;
A(int a,int b)
{
x=a;
y=b;
}
public void display()
{
int z;
z=x+y;
System.out.println("add="+z);
}
}
class B extends A
{
B(int a,int b)
{
super(a,b);
}
public void display()
{
int z;
z=x*y;
System.out.println("product="+z);
}
class ResuiltDemo extends B
{
ResuiltDemo(int x,int y)
{
super(x,y);
}
public static void main(String args[])
{
A num1=new A(7,14);
B num2=new B(7,14);
ResuiltDemo num3=new ResuiltDemo(7,14);
num1.display();
num2.display();
num3.display();
}
}
class A
{
public int x,y;
A(int a,int b)
{
x=a;
y=b;
}
public void display()
{
int z;
z=x+y;
System.out.println("add="+z);
}
}
class B extends A
{
B(int a,int b)
{
super(a,b);
}
public void display()
{
int z;
z=x*y;
System.out.println("product="+z);
}
class ResuiltDemo extends B
{
ResuiltDemo(int x,int y)
{
super(x,y);
}
public static void main(String args[])
{
A num1=new A(7,14);
B num2=new B(7,14);
ResuiltDemo num3=new ResuiltDemo(7,14);
num1.display();
num2.display();
num3.display();
}
}
{
public int x,y;
A(int a,int b)
{
x=a;
y=b;
}
public void display()
{
int z;
z=x+y;
System.out.println("add="+z);
}
}
class B extends A
{
B(int a,int b)
{
super(a,b);
}
public void display()
{
int z;
z=x*y;
System.out.println("product="+z);
}
}
public class Test extends B
{
Test(int x,int y)
{
super(x,y);
}
public static void main(String args[])
{
A num1=new A(7,14);
B num2=new B(7,14);
Test num3=new Test(7,14);
num1.display();
num2.display();
num3.display();
}
}