Financial Records Create a program to store weekly expenses and revenues over a

Question

Financial Records

Create a program to store weekly expenses and revenues over a period of time. The program should

store the expenses and revenues in two global array variables. Values stored in the array at index k

represent the total revenues/expenses recorded during the k(th) week. Assume that the maximum number of weeks tracked is 250.

Add the following functions to your program:

-

A function that finds the total of all expenses incurred since week t for a given t.

-

A function that records the total expenses and revenues for the next unrecorded week. It must check if there is still space in the array.

-

A function that prints the number of weeks recorded

-

A function that prints all revenues and expenses recorded

-

A function that returns a pointer to the largest revenue recorded

Organize the program so the function prototypes are presented

first, and the definitions after the main

function. Your program should keep asking the user to select

one of the following options and execute

the corresponding function based on the user choice:

(A)

computed the total of all expenses,

(B)

add a new expense/revenue ,

(C)

print the number of weeks recorded,

(D)

print all revenues and expenses recorded,

(E)

print the largest revenue recorded, or

(F)

exit the program.

Explanation / Answer

FinancialRecords.java

import java.util.Scanner;
class FinancialRecords{
   private double expenses[] = new double[250];
   private double revenues[] = new double[250];
   private int noOfWeeksRecorded=0;//tracks that number of weeks that have been recorded already
   private int largestRevenueIndex;//tracks largest revenue index that has been recorded
  
   public static void main(String a[]){
       FinancialRecords fr = new FinancialRecords();
       Scanner input = new Scanner(System.in);//to take input from user
       String choice;
       do{
           System.out.println("Enter 'F' to exit");
           System.out.println("A-Computed the total of all expenses since given week B-Add a new expense/revenue C-print the number of weeks recorded D-print all revenues and expenses recorded E-print the largest revenue recorded F-Exit the program");
           choice = input.next();
          
           if(choice.equals("A")){
           //asking user to enter a week number
               System.out.println("Enter a week number:");
               int num = input.nextInt();
               System.out.println(fr.calculateTotalExpenseSinceT(num));
           }
           else if(choice.equals("B")){
               //asking user to enter expense and revenue for next unrecorded week
               System.out.println("Enter Expense:");
               double expense = input.nextDouble();
               System.out.println("Enter Revenue:");
               double revenue = input.nextDouble();
              
               fr.recordExpensesAndRevenues(expense,revenue);
           }
           else if(choice.equals("C"))
           System.out.println("Number of weeks Recorded:"+fr.calculateNumberOfWeeksRecorded());
           else if(choice.equals("D"))
           fr.printAllExpensesAndRevenues();
           else if(choice.equals("E"))
           System.out.println("Largest Revenue:"+fr.revenues[fr.findLargestRevenueRecordIndex()]);
           else if(!choice.equals("F"))
           System.out.println("Enter valid Character!!!");//asking user to enter valid character that are A,B,C,D,E,F;
          
       }
       while(!choice.equals("F"));//loop untill user enters 'F';
   }
   public double calculateTotalExpenseSinceT(int weekNumber){
       //checking weeknumber is valid(>0) and must be less than or equal to number of weeks recorded
       if(weekNumber>=1 && weekNumber<=calculateNumberOfWeeksRecorded()){
           double total=0.0;
           for(int i=weekNumber-1;i<calculateNumberOfWeeksRecorded();i++){//adding all expenses since week number
               total+=expenses[i];
           }
           return total;
       }
       else{
           //user asking for unrecorded week expenses
           System.out.println("This week has not yet been recorded!!!");
           return -1.0;
       }
   }
   public void recordExpensesAndRevenues(double expense,double revenue){
       //checking if there is space in arrays to record
       if(calculateNumberOfWeeksRecorded()<250){
           this.expenses[calculateNumberOfWeeksRecorded()] = expense;
           this.revenues[calculateNumberOfWeeksRecorded()] = revenue;
          
           //for tracking largestRevenueIndex
           if(revenues[this.largestRevenueIndex]<revenue)
           this.largestRevenueIndex = this.noOfWeeksRecorded;
          
           this.noOfWeeksRecorded++;
           System.out.println("Record added successfully!");
       }
       else
       System.out.println("Sorry! there is no space to record!!!");
   }
  
   public int calculateNumberOfWeeksRecorded(){
       return this.noOfWeeksRecorded;
   }
   public void printAllExpensesAndRevenues(){
       System.out.println("Expenses Revenues");
       for(int i=0;i<calculateNumberOfWeeksRecorded();i++){
           System.out.println(expenses[i]+" "+revenues[i]);
       }
   }
   public int findLargestRevenueRecordIndex(){//returning largest revenue index
       return this.largestRevenueIndex;
   }
  
}

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