* I\'m using Eclipse Objectives: Using for loops, nested for loops and parameter

Question

* I'm using Eclipse

Objectives: Using for loops, nested for loops and parameterized methods.
a. Write a program using a for loop to calculate how high a ball bounces on each of its first 20 bounces. The ball starts at 10 meters above the bounce surface. Each bounce brings the ball to 4/5 of its previous height. Thus, the first bounce it will reach 8 meters. Print the 20 heights, labeled such as: (Ignore the strange precision of some output values.)
After bounce 1 the ball reaches 8.0 meters
After bounce 2 the ball reaches 6.4 meters
After bounce 3 the ball reaches 5.120000000000001 meters

...

HERE IS WHAT I HAVE:

public class BallBounces {

   public static void main(String[] args) {
       for ( int i = 1; i <= 20; i++ ){
       double j = 10;
           System.out.print("After bounce " + i + " the ball reaches ");
           System.out.println(j*4/5 + " meters");
       }
   }
}

Explanation / Answer

http://ideone.com/QalIjC

class BallBounces {

   public static void main(String[] args) {

  double j = 10;
       for ( int i = 1; i <= 20; i++ ){
           System.out.print("After bounce " + i + " the ball reaches ");
           System.out.println(j + " meters");

j = 4*j/5;

// you have to update the value of j after every loop
       }
   }
}

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.