import java.lang.Math; import java.util.Scanner; /* * ExpenseCalculator * * A class with basic expense calculations methods * */ public class ExpenseCalculator { // Calculation constants: private static final double GST = 5.0; // Good and Service tax rate private static final double HOTEL_TAX = 8.0; // Hotel tax rate private static final double LOW_MILEAGE_RATE = 0.24; // $ per km mileage rate private static final double HIGH_MILEAGE_RATE = 0.48; // $ per km mileage rate private static final int MILEAGE_LIMIT = 100; // The low mileage limit private static final int DAYS_PER_WEEK = 7; // 7 days in a week private static final int DAILY_FOOD_RATE = 65; // daily food expense rate private static final int WEEKLY_FOOD_RATE = 345; // weekly food expense rate private static final int FOOD_RATE_CUT = 10; // % deducted from food reimbursement reimbursment // Array access constants: protected static final int KMS_DRIVE_INDEX = 0; protected static final int HOTEL_COST_INDEX = 1; protected static final int NUM_DAYS_INDEX = 2; /* * calcMileage * * Purpose: calculates the mileage cost given the number of km driven * NOTE:LOW_MILEAGE_RATE applied to kms up to and including 100 kms * HIGH_MILEAGE_RATE applied to kms over MILEAGE_LIMIT kms * * Parameters: double - the number of kms driven * * Preconditions: kms >=0 * * Returns: double - the amount of calculated mileage expense * */ // TODO... /* * calcHotel * * Purpose: calculates the hotel cost given the rate and number of days in the city * * NOTE: hotels charge both GST and Hotel tax and should be calculated * and added to the expense total returned. * * Parameters: double - nightly rate of the hotel, int - number of days of travel * * Preconditions: numNights >= 0 * * Returns: double - the amount of calculated hotel expense * */ // TODO... /* * calcFood * * Purpose: calculates the food cost given the number of days of travel * NOTE: if travel is 7 or more days uses WEEKLY_FOOD_RATE * with for less than full weeks * ie. if travel is 9 days, rate will be: * one week at WEEKLY_FOOD_RATE + 2/7 of the WEEKLY_FOOD_RATE * less than 7 days uses DAILY_FOOD_RATE * if travel is more than 4 weeks, the total reimbursment will * be reduced by the percent defined in FOOD_RATE_CUT * * Parameters: int - number of days of travel * * Preconditions: the number of days is >= 1 * * Returns: double - the amount of calculated food expense * */ // TODO... /* * calcTotalExpense * * Purpose: calculates the expenses for a person as: * the sum of mileage, hotel and food costs * NOTE: hotel is not needed for the last day of travel * * Parameters: double[] - an array of data from a single person at the following indices: * [KMS_DRIVE_INDEX] - the number of kms they drove * [HOTEL_COST_INDEX] - the cost of the hotel per night * [NUM_DAYS_INDEX] - the number of days they were traveling * * Preconditions: data must be of length 3 with expected values at indices listed above * * Returns: double - total expenses for a person with the given data * */ // TODO... /* * calcAllExpenses * * Purpose: calculates the expenses for each person in a population * and stores the result in the corresponding index of the 1D result array * * Parameters: double[][] - a 2D array of data for a populution where, * each row represents a person in the population and * each column of a row has the following data for that individual: * [KMS_DRIVE_INDEX] - the number of kms they drove * [HOTEL_COST_INDEX] - the cost of the hotel per night * [NUM_DAYS_INDEX] - the number of days they were traveling * * NOTE: the decimal portion of the values stored in the result array will be truncated * * Preconditions: the data array must have 3 columns and * the length of the 1D result array must be * equal to the number of rows in the data array * * Returns: int[] - a 1D array to store the total expense for each individual * */ // TODO... }