Constructor Overloading

Lab Java Intermediate 20 points

Create Rectangle with constructors Rectangle() (1×1), Rectangle(int side) (square) and Rectangle(int w, int h), chained with this(...). Read lines with 0, 1 or 2 numbers and print WxH area=A.

Input

n, then n lines (a line may be - for no numbers).

Output

n lines.

Example

Input

Output

1x1 area=1
4x4 area=16
2x7 area=14

Sample input available Sample output available

Editor

Java

Hints

this(...) calls another constructor of the same class and must be the first statement.

Solution explanation

Chaining constructors keeps the real initialisation in one place.

Show solution

import java.util.Scanner;

class Rectangle {
    final int w, h;

    Rectangle() {
        this(1);
    }

    Rectangle(int side) {
        this(side, side);
    }

    Rectangle(int w, int h) {
        this.w = w;
        this.h = h;
    }

    @Override
    public String toString() {
        return w + "x" + h + " area=" + (w * h);
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.nextLine().trim());
        for (int i = 0; i < n; i++) {
            String line = sc.nextLine().trim();
            String[] p = line.split("\\s+");
            Rectangle r;
            if (line.equals("-")) {
                r = new Rectangle();
            } else if (p.length == 1) {
                r = new Rectangle(Integer.parseInt(p[0]));
            } else {
                r = new Rectangle(Integer.parseInt(p[0]), Integer.parseInt(p[1]));
            }
            System.out.println(r);
        }
    }
}

Output

Answer