Question

Need some guidance with the following problems as I am new to Java programming. Any assistance is greatly appreciated.

Thanks

Using printf and specifiers for all print instructions:

1.            Code the following:

a.            10% is stored in a variable called discount when the customer is a student; otherwise, it stores 0%. Code this if … else control structure using the conditional operator (ternary operator). The variables discount and student have already been declared. Assume student is a boolean variable.

b.            Code a do-while loop that keeps printing the message “JACKPOT!” as long as reel1 and reel2 and reel3 equals “Ace”. Use equalsIgnoreCase() as the method to compare what is in the reel variables to “Ace”. Assume reel1, reel2, reel3, and input (for the Scanner class) are already declared.

c.             Re-code 1b using a while loop. Prime the reel variables so the loop is entered the first time.

d.            Code a fall-through switch statement that will print the following messages:

When the value in guess is 1: “Sorry, the coin is not here!”

When the value in guess is 2: “Sorry, the coin is not here!”

When the value in guess is 3: “Bazinga! Take the coin!”

When the value in guess is any other value: “The way you’re luck is running, if you were a politician you’d be honest!”

e.            Re-code 1d using double-selection ifs.

f.             Code a for loop that let’s contestants exit if they guess the correct number of pennies in a penny jar, but only allows 5 attempts. The error message, “Wrong guess! Try again!”, prints when the loop is entered and the guess is wrong. If the contestant enters the correct number of pennies and before exiting the loop, a congratulatory message prints, “Congratulations! You’ve won $100!”. The actual number of pennies is 1000 and what the contestant enters is stored in a variable called numberOfPennies. Assume numberOfPennies and the input variable for the Scanner class are already declared.    

g.            Re-code the following as a while loop with a switch statement. Assume go is a declared boolean variable that has been initialized to true.

do

{

                System.out.printf(“%nEnter the color of the traffic light: “

+ “%n%n1. Green”

+ “%n2. Yellow”

+ “%n3. Red%n”);

                trafficLight = input.nextInt();

                if(trafficLight == 1)

                {

                                System.out.printf(“%nStep on the gas pedal and go!%n”);

                                go = false;                          

                }

                if(trafficLight == 2)

                {

                                System.out.printf(“%nPress on the brake and prepare to stop!%n”);                        

                                go = false;

                }

                if(trafficLight == 3)

                {

                                System.out.printf(“%nSTOP!!!%n”);

                                go = false;                          

                }

                if(trafficLight < 1 || trafficLight > 3)

                {                             

                                System.out.printf(“%nInvalid choice! Try again!%n”);                     

                }

               

} while(go);         // END do-while when go is false

Answer 1

Please let me know if you need more information:-

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import java.util.Scanner;

public class Tester2 {

   public static void main(String[] args) {

       /**
       * a. 10% is stored in a variable called discount when the customer is a
       * student; otherwise, it stores 0%. Code this if … else control structure using
       * the conditional operator (ternary operator). The variables discount and
       * student have already been declared. Assume student is a boolean variable.
       */
       boolean student = false; // This can be changed and tested;
       float discount = student ? (10 / 100) : 0; // If student true then it will be 10%, if not 0%
       System.out.println(discount);

       /**
       * b. Code a do-while loop that keeps printing the message “JACKPOT!” as long as
       * reel1 and reel2 and reel3 equals “Ace”. Use equalsIgnoreCase() as the method
       * to compare what is in the reel variables to “Ace”. Assume reel1, reel2,
       * reel3, and input (for the Scanner class) are already declared.
       */
       Scanner input = new Scanner(System.in);
       String reel1 = "", reel2 = "", reel3 = "";
       do {
           System.out.println("JACKPOT!");
           System.out.println("Enter reel1: ");
           reel1 = input.nextLine();// Reads input
           System.out.println("Enter reel2: ");
           reel2 = input.nextLine();// Reads input
           System.out.println("Enter reel3: ");
           reel3 = input.nextLine();// Reads input
       } while (!(reel1.equalsIgnoreCase("Ace") && reel2.equalsIgnoreCase("Ace") && reel3.equalsIgnoreCase("Ace")));

       /**
       * c. Re-code 1b using a while loop. Prime the reel variables so the loop is
       * entered the first time.
       */
       reel1 = reel2 = reel3 = "";
       while (!(reel1.equalsIgnoreCase("Ace") && reel2.equalsIgnoreCase("Ace") && reel3.equalsIgnoreCase("Ace"))) {
           System.out.println("JACKPOT!");
           System.out.println("Enter reel1: ");
           reel1 = input.nextLine();// Reads input
           System.out.println("Enter reel2: ");
           reel2 = input.nextLine();// Reads input
           System.out.println("Enter reel3: ");
           reel3 = input.nextLine();// Reads input
       }

       /**
       * d. Code a fall-through switch statement that will print the following
       * messages:
       *
       * When the value in guess is 1: “Sorry, the coin is not here!”
       *
       * When the value in guess is 2: “Sorry, the coin is not here!”
       *
       * When the value in guess is 3: “Bazinga! Take the coin!”
       *
       * When the value in guess is any other value: “The way you’re luck is running,
       * if you were a politician you’d be honest!”
       */
       int guess = 2;// This can be changed for testing
       switch (guess) {
       case 1:
           System.out.println("Sorry, the coin is not here!");
           break;
       case 2:
           System.out.println("Sorry, the coin is not here!");
           break;
       case 3:
           System.out.println("Bazinga! Take the coin!");
           break;
       default:
           System.out.println("The way you’re luck is running, if you were a politician you’d be honest!");
       }

       /**
       * e. Re-code 1d using double-selection ifs.
       */
       if (guess == 1) {
           System.out.println("Sorry, the coin is not here!");
       } else if (guess == 2) {
           System.out.println("Sorry, the coin is not here!");
       } else if (guess == 3) {
           System.out.println("Bazinga! Take the coin!");
       } else {
           System.out.println("The way you’re luck is running, if you were a politician you’d be honest!");
       }

       /**
       * f. Code a for loop that let’s contestants exit if they guess the correct
       * number of pennies in a penny jar, but only allows 5 attempts. The error
       * message, “Wrong guess! Try again!”, prints when the loop is entered and the
       * guess is wrong. If the contestant enters the correct number of pennies and
       * before exiting the loop, a congratulatory message prints, “Congratulations!
       * You’ve won $100!”. The actual number of pennies is 1000 and what the
       * contestant enters is stored in a variable called numberOfPennies. Assume
       * numberOfPennies and the input variable for the Scanner class are already
       * declared.
       */
       for (int i = 0; i < 5; i++) {
           System.out.println("Enter the guess: ");
           int numberOfPennies = input.nextInt();
           if (numberOfPennies == 1000) {
               System.out.println("You’ve won $100!");
               break;
           } else {
               System.out.println("Wrong guess! Try again!");
           }
       }

       /**
       * g. Re-code the following as a while loop with a switch statement. Assume go
       * is a declared boolean variable that has been initialized to true.
       */

       int trafficLight;
       boolean go = false;
       do {
           System.out.printf("%nEnter the color of the traffic light: "

                   + "%n%n1. Green"

                   + "%n2. Yellow"

                   + "%n3. Red%n");
           trafficLight = input.nextInt();
           switch (trafficLight) {
           case 1:
               System.out.printf("%nStep on the gas pedal and go!%n");
               go = false;
               break;
           case 2:
               System.out.printf("%nPress on the brake and prepare to stop!%n");
               go = false;
               break;
           case 3:
               System.out.printf("%nSTOP!!!%n");
               go = false;
               break;
           default:
               System.out.printf("%nInvalid choice! Try again!%n");
               break;
           }
       } while (go); // END do-while when go is false

   }

}

================================

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============================

OUTPUT:-

0.0
JACKPOT!
Enter reel1:
d
Enter reel2:
s
Enter reel3:
d
JACKPOT!
Enter reel1:
Ace
Enter reel2:
Ace
Enter reel3:
Ace
JACKPOT!
Enter reel1:
Ace
Enter reel2:
Ace
Enter reel3:
Ace
Sorry, the coin is not here!
Sorry, the coin is not here!
Enter the guess:
1
Wrong guess! Try again!
Enter the guess:
2
Wrong guess! Try again!
Enter the guess:
4
Wrong guess! Try again!
Enter the guess:
5
Wrong guess! Try again!
Enter the guess:
1000
You’ve won $100!

Enter the color of the traffic light:

1. Green
2. Yellow
3. Red
1

Step on the gas pedal and go!

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Thanks