Question

Write a program that lets the user enter the total amount of money spent on a credit card for each of 12 months into an array of doubles. The program should calculate and display the total amount of money spent for the year, the average monthly spent, and the months with the highest and lowest amounts.

Input Validation: Do not accept negative numbers for monthly credit card charges. If the credit card charge for the month is negative, assume the value to be 0.

Answer 1

import java.util.Scanner;

public class AverageCreditCardBill {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double[] amounts = new double[12];
        String[] months = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

        double total = 0;
        for (int i = 0; i < amounts.length; i++) {
            System.out.print("Enter money spent on " + months[i] + ": ");
            amounts[i] = in.nextDouble();
            total += amounts[i];
        }
        double average = total / amounts.length;
        int minMonth = 0, maxMonth = 0;
        for (int i = 0; i < amounts.length; i++) {
            if (amounts[i] > amounts[maxMonth]) maxMonth = i;
            if (amounts[i] < amounts[minMonth]) minMonth = i;
        }
        System.out.println("Total amount of money spent = $" + total);
        System.out.println("Average amount of money spent = $" + average);
        System.out.println("You spent highest money on " + months[maxMonth]);
        System.out.println("You spent lowest money on " + months[minMonth]);
    }
}