/*******************************************
     Solutions of Review #3 - Question 1.
*******************************************/
k= 0
k= 1
k= 2
k= 3
j= 14


/*******************************************
     Solutions of Review #3 - Question 2.
*******************************************/
       int n = Keyboard.readInt();
       int row = 1;
       
       while ( row <= n ) {
           int col = 1;
           while( col <= row ) {
              if ( row %2 == 1 )
                  System.out.print("*");
              else
                  System.out.print("?");
              col++;
            }
           System.out.println();
           row++;
       }


   /* Alternate solution using for loop */

        int row, col;
        System.out.print("Enter integer n: number of lines  ");
        int n = Keyboard.readInt();

        for (row =1; row<=n; row++) {
            for (col=1; col<=row; col++) {

               if ( row %2 == 1 )
                   System.out.print("*");
               else
                   System.out.print("?");
            }
            System.out.println();
        }


/*******************************************
     Solutions of Review #3 - Question 3.
*******************************************/

import cs1.Keyboard;

public class Q3 {
   public static void main(String args[]) {
        int n,a,b,c;
        
	System.out.println("Enter 1 to continue, 0 to quit");
	n = Keyboard.readInt(); 
	while (n != 0){
		a = (int)(Math.random()*10);
		b = (int)(Math.random()*10);
		c = (int)(Math.random()*10);
		System.out.println(a + " " + b + " " + c);
		if(a == b && b == c)
			System.out.println("JACKPOT!!!");
		n = Keyboard.readInt();
        }
   }
} // class Q3


/*******************************************
     Solutions of Review #3 - Question 4.
*******************************************/

public class Calculation {
  public static void main(String[] args) {
    // create two Sphere objects
    Sphere ball = new Sphere(4.0, "ball");
    Sphere orange = new Sphere(4.0, "orange");

    // compute volume of the ball
    double ballVol = ball.getVolume();

    // print a description of the orange
    System.out.println(orange);
  }// end main
}// class Calculation


public class Sphere {
  private double radius;       // radius of sphere
  private String type ;        // what the sphere is

  // Constructor: assign values to the two instance variables of the sphere
  public Sphere(double r, String t) {
    radius = r;
    type = t;
  }// end constructor

  // instance method getVolume for calculating volume of the Sphere
  public double getVolume() {
    return (4./3*Math.PI*Math.pow(radius, 3));
  }

  // define a toString method for showing the type and radius of the Sphere
  public String toString() {
    return ("The object is " + type +  " with radius " + radius);
  }
}// class Sphere