Question

In Java.

Use the concept of LOOPS:

2.Write a program that calculates the amount a person would earn over a period of time if his

or her salary is one penny the first day, two pennies the second day, and continues to double

each day. The program should display a table showing the salary for each day, and then

show the total pay at the end of the period. The output should be displayed in a dollar

amount, not the number of pennies.

Input Validation: Do not accept a number less than 1 for the number of days worked.

Answer 1

Programme Code:

import javax.swing.JOptionPane;

public class PenniesForPay

{

public static void main(String[] args)

{

String inputString;

int pennies; // Penny accumulator

int totalPay; // Total pay accumulator

int maxDays; // Max number of days

int day; // Day counter

inputString = JOptionPane.showInputDialog("For how many days will you work? ");;

maxDays = Integer.parseInt(inputString);

  

// Validate the input

while (maxDays < 1){

inputString = JOptionPane.showInputDialog("The number of days " + "must be at least 1.\nEnter the number of days: ");

maxDays = Integer.parseInt(inputString);

}

  

day = 1;

pennies = 1;

totalPay = 0;

while (day <= maxDays)

{

// Display the day number and pennies earned.

JOptionPane.showMessageDialog(null, "Day:\t" + day + "\nPennies Earned:\t" + pennies);

  

// Accumulate the total pay.

totalPay = totalPay + pennies;

  

// Increment for the next day.

day++;

  

// Double the number of pennies.

pennies = pennies * 2;

}

  

JOptionPane.showMessageDialog(null, "Total pay: $" + totalPay / 100.0);

}

}
Out Put : I take 3 Days.

For Day 1:

For Day 2:

For Day 3:

Total Earned Money:

This Way You can Solve this . I used Blue J Compiler to Solve this.