Question

Objectives: • Perform C++ user-define object manipulations • Define class using OO approach • Understand how to create and manipulate list of objects using vector class • Handle input errors and invalid values • Design and create a well-structure program using C++ basic programming constructs and classes. Description: Simply enhance programming project #2 (Manage Expenses) with the followings: 1. Define a new class named “Expense” that manages an expense amount and its description 2. Use Vector class instead of array to manage a list of Expense objects 3. Add support for a new “search” command for expenses that contain the search string Requirements: 1. The program should continue to work as described in project #2 even though internally it uses new vector object that manages a list of Expense objects... 2. The program now accepts a new added command: search search-string where it displays a list of expenses that has description that contains the search string Required error handling: The program MUST still have the same error handling as required in project #2 Extra credit: • Add a new “delete” command that accepts the amount of expense and it will go through the list of all the expenses that has amount.

Answer 1

Thanks for the question.

Here is the completed code for this problem. Let me know if you have any doubts or if you need anything to change.

Thank You !!

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// Expense.header file

#ifndef EXPENSE_H
#define EXPENSE_H
#include<string>
using namespace std;

class Expense
{
   public:
       Expense();
       Expense(string,double);
       string getDescription()const;
       double getAmount() const;
       void setDescription(string);
       void setAmount(double);
      
   private:
       string description;
       double amount;
};

#endif

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​​​​​​​// Expense.cpp file

#include "Expense.h"
#include<string>
using namespace std;

   Expense::Expense():description{""},amount{0}{
   }
   Expense::Expense(string description,double amount):description{description},amount{amount}{
   }
   string Expense::getDescription()const {
   return this->description;
   }
   double Expense::getAmount() const{
   return this->amount;
   }
   void Expense::setDescription(string desc){
       this->description=desc;
   }
   void Expense::setAmount(double amount){
       this->amount=amount;
   }

=============================================================================================

// main.cpp file

#include <iostream>
#include<string>
#include<vector>
#include "Expense.h"
using namespace std;

void searchItem(const vector<Expense> &items, string search){
  
   for(int index=0; index<items.size();index++){
       if(items.at(index).getDescription().compare(search)==0){
           cout<<"Item Description: "<<items.at(index).getDescription()<<", Expense Amount: $"<<items.at(index).getAmount()<<endl;
       }
   }
}

void deleteItem(vector<Expense> &items, double amount){
  
   vector<Expense>::iterator it;
  
   for(it=items.begin();it!=items.end();it++){
       if(it->getAmount()==amount){
           cout<<"Item Description: "<<it->getDescription()<<", Expense Amount: $"<<it->getAmount()<<" deleted."<<endl;
           items.erase(it); it--;

       }
   }
}

int main(void) {
  
   vector<Expense> expenses;
   expenses.push_back(Expense("Mobile",400));
   expenses.push_back(Expense("Shirt",450));
   expenses.push_back(Expense("Trousers",600));
   expenses.push_back(Expense("Laptop",1000));
   expenses.push_back(Expense("Watch",400));
  
   int choice=0;
   string search;
   double amount;
   while(choice!=3){
       cout<<"[1] Search an item"<<endl;
       cout<<"[2] Delete an item"<<endl;
       cout<<"[3] Exit"<<endl;
       cout<<"Enter choice: ";cin>>choice;cin.get();
       switch(choice){
           case 1:
               cout<<"Enter description of the item you want to search: ";
               getline(cin,search);
               searchItem(expenses,search);
               break;
           case 2:
               cout<<"Enter the amount you want to delete: ";cin>>amount;
               deleteItem(expenses,amount);
               break;
           case 3:
               cout<<"Thanks for using. Good Bye !";
       }
   }
  

}

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