pls help me?

Question

this program not work in java

error is w and h not foun

so correct it
+++++++++++++++
class box{
int w=0;
int h=0;
}

class exam {
public static void main (String args[]) {
int x;
box first = new box();

first.w=10;
first.h=20;
x=w*h;

System.out.println("x"+x);

}
}

Answer 1

Two things:

1. you need to make the two members w and h of the class box public : public int w=0; public int h=0;
2. in the second last code line you write x = w*h, while it should read x=first.w * first.h;

Answer 2

class box{
int w=0;
int h=0;
}

class exam {
public static void main (String args[]) {
int x;
box first = new box();

first.w=10;
first.h=20;
x=w*h;

System.out.println(x);

}
}

Answer 3

w & h are private members of class & you cant access them directly. Use public keyword before their declaration instead.

Answer 4

not me would love to but no idea