Assignment 97

 import java.util.Scanner;

public class AreaCalculator
{
    public static void main( String[] args )
    {
        Scanner keyboard = new Scanner(System.in);
        
        int radius, length, width, side, base, height, menu;
        
        System.out.println("Area Calculator");
        
        do {
            System.out.print("\n-=-=-=-=-=-=-=-=-=-=-=-=-=-=-\n\n1) Triangle\n2) Rectangle\n3) Square\n4) Circle\n5) Quit\n>> ");
            menu = keyboard.nextInt();
            System.out.println();
            
            if (menu == 1)
            {
                System.out.print("Base: ");
                base = keyboard.nextInt();
                System.out.print("Height: ");
                height = keyboard.nextInt();
                
                System.out.println("The area is " + areaTriangle(base,height) + ".");
            }
            else if (menu == 2)
            {
                System.out.print("Length: ");
                length = keyboard.nextInt();
                System.out.print("Width: ");
                width = keyboard.nextInt();
                
                System.out.println("The area is " + areaRectangle(length,width) + ".");
            }
            else if (menu == 3)
            {
                System.out.print("Side length: ");
                side = keyboard.nextInt();
                
                System.out.println("The area is " + areaSquare(side) + ".");
            }
            else if (menu == 4)
            {
                System.out.print("Radius: ");
                radius = keyboard.nextInt();
                
                System.out.println("The area is " + areaCircle(radius) + ".");
            }
        } while (menu != 5);
    }
    
    public static double areaTriangle( int base, int height )
    {
        double area = base * height * .5;
        return area;
    }
    public static int areaRectangle( int length, int width )
    {
        int area = length * width;
        return area;
    }
    public static int areaSquare( int side )
    {
        int area = side * side;
        return area;
    }
    public static double areaCircle( int radius )
    {
        double area = radius * radius * Math.PI;
        return area;
    }
}