Java Question: Provide the required missing code and algorithm for this water bill problem to work.

import java.lang.*; import java.util.Scanner; public class WaterBillAnnualSummary{

public static void main(String[] args){ int[] presentReading= new int[12]; int[] startReading= new int[12]; Scanner scanner = new Scanner(System.in); String consumer=""; // to hold name of consumer char cType = 'x'; // to hold type of consumer int[] nCMUsed = new int[12]; /* to hold number of cubic meters of water used for 12 months */ int minCMResidential=12; /*to hold cut-off for minimum Bill for residential consumers */ double minBillResidential=180.00; // minimum bill for <= 12 Cubic Meters used float rateResidential =30.00F; //cost of 1 Cubic Meter above the min. consumption int minCMCommercial=30; /* to hold cut-off for minimum Bill for commercial consumers*/ double minBillCommercial=600.00; // minimum bill for <= 20Cubic Meters used float rateCommercial =50.00F; /*cost of 1 Cubic Meter above the min. consumption for commercial consumers*/ double[] amountDue= new double[12]; // to hold the amount paid for 12 months

showIntroduction(); System.out.print("Enter the name of the water consumer: "); consumer = scanner.nextLine(); cType = readTypeOfConsumer(); startReading[0] = readStartReading(); for (int index=0; index < nCMUsed.length; index++){ presentReading[index] = readEndOfMonthReading(startReading[index], (index+1)); if (index < (nCMUsed.length - 1)) startReading[index+1] = presentReading[index]; nCMUsed[index] = presentReading[index] - startReading[index]; amountDue[index] = computeAmountDue(nCMUsed[index], cType, minCMResidential, minBillResidential, minCMCommercial, minBillCommercial, rateResidential, rateCommercial); }

showSummary(consumer, cType, startReading, presentReading, nCMUsed, amountDue); System.exit(0); } /** *Computes and returns the average of the elements an array of floating point numbers*/

public static double computeAverage(double[] values){ double total=0; // to hold the total of all elements double average=0; // to hold the average for (double element : values) // add the elements total = total + element;

//compute the average average = total/values.length ; // total divided by number of elements return average; }

/** *Computes and returns the average of the elements an array of integers */ public static double computeAverage(int[] values){ double total=0; // to hold the total of all elements double average=0; // to hold the average for (int element : values) // add the elements total = total + element; //compute the average average = (double) total/values.length ; //total divided by number of elements return average; }

/** * The following method finds and returns the index of the element with the lowest value * from an array of positive integers. * The Linear Search algorithm is applied.*/ public static int findLowest(int[] values){ int result=values[0]; // let lowest be the first element for (int element : values ) // find out if an element after the first is lower if (element < result) result = element; // then set lowest index to the index of lower element return result; }

/** *Finds and returns the index of the element with the highest value from an array of integers*/ public static int findHighest(int[] values){ int result=values[0]; // let highest be the first element for (int element: values ) // find out if an element after the first is higher if (element > result) result = element; //then set highest index to the index of higher element return result; }

//REQUIRED: Provide the algorithm

public static void showSummary(String n, char t, int[] previous, int[] present, int[] c, double[] amount){ System.out.println(); System.out.println("Annual Water Bill Summary"); System.out.println("Name of Consumer: " + n); System.out.print("Type of consumer: "); if (Character.toLowerCase(t) == 'r') System.out.println("Residential"); if (Character.toLowerCase(t) == 'c') System.out.println("Commercial"); System.out.println("Meter reading at the beginning of year = " + previous[0] + " cubic meters"); System.out.printf("%15s%15s%15s%20s%n", "---------------", "--------------", "---------- -----", "--------------------"); System.out.printf("%15s%15s%15s%20s%n", "Month", "End Reading", "Consumption", "Amount Paid"); System.out.printf("%15s%15s%15s%20s%n", "---------------", "--------------", "---------- -----", "--------------------"); for (int index=0; index < previous.length; index++){ System.out.printf("%15s%15d%15d%20.2f%n", monthInWord(index+1), present[index],c[index] , amount[index]); } System.out.printf("%15s%15s%15s%20s%n", "---------------", "--------------", "---------- -----", "--------------------"); System.out.println("Average Monthly Reading = "+ computeAverage(c)); System.out.println("Average Monthly Payment = "+ computeAverage(amount)); System.out.println("Month with Lowest Water Consumption = "+ monthInWord((findLowest(c) + 1))); System.out.println("Month with Highest Water Consumption = "+ monthInWord((findHighest(c) + 1))); System.out.printf("%15s%15s%15s%20s%n", "---------------", "--------------", "---------- -----", "--------------------"); return; } // REQUIRED: Provide the algorithm

public static String monthInWord(int m){ String r=""; switch ( m ){ case 1 : r = "January"; break; case 2 : r = "February"; break; case 3 : r = "March"; break; case 4 : r = "April"; break; case 5 : r = "May"; break; case 6 : r = "June"; break; case 7 : r = "July"; break; case 8 : r = "August"; break; case 9 : r = "September"; break; case 10 : r = "October"; break; case 11 : r = "November"; break; case 12 : r = "December"; } // end of switch return r; } // end of monthInWord method

//REQUIRED: Provide the algorithm and the code

public static void showIntroduction(){ // REQUIRED: Provide the code

return; } // REQUIRED: Provide the algorithm and provide missing statements to complete the code public static int readStartReading(){ /* REQUIRED: Declare local variables */ do { problemFlag = false; try { System.out.print("Enter the meter reading at the beginning of the year: "); // REQUIRED: Provide the input statement } catch (NumberFormatException x){ problemFlag = true; System.out.println("You have to enter a number."); } if (reading < 0){ System.out.println("The beginning meter reading cannot be negative."); } } while (reading < 0 || problemFlag); return reading; } // REQUIRED: Provide the algorithm and provide the missing statements to complete the code public static int readEndOfMonthReading(int start, int month){ /*REQUIRED: Declare local variables */ do { try { pFlag = false; System.out.print("Enter the meter reading for month " + monthInWord(month) + " :"); //REQUIRED: Provide the necessary input statement } catch (NumberFormatException x){ pFlag = true; System.out.println("You have to enter a number."); } if (reading < start){ System.out.println("Invalid datum entry! The present reading must be greater than the previous reading."); } } while (reading < start || pFlag); return reading; } // REQUIRED: Provide the algorithm and provide the missing statements to complete the code public static char readTypeOfConsumer(){ /*REQUIRED: Declare local variables */ do { System.out.print("Enter the type of the consumer< you may type r for residential or c for commercial>: "); //REQUIRED: Provide needed statement(s) if (t != 'r' && t !='R' && t != 'c' && t != 'C'){ System.out.println("The valid types are r for residential and c for commercial."); } } while (t != 'r' && t !='R' && t != 'c' && t != 'C'); return t; } // REQUIRED: Provide the algorithm public static double computeAmountDue(int c, char t, int min1, double minB1, int min2, double minB2, float rate1, float rate2){ double amount = 0; switch (t){ case 'r': case 'R': if ( c <= min1 ) { amount = minB1; } else { amount = minB1 + (c-min1)*rate1; } break; case 'c': case 'C': if ( c <= min2 ) { amount = minB2; } else { amount = minB2 + (c-min2)*rate2; } } return amount; } } // end of class