Question

c++ problem

You are asked to implement a car ordering system for Bobcats Auto Dealership. This dealership is brand new and only sells one brand of cars with three different models. However, a buyer can add options if they choose. Write a C++ program that allows the user to order a single car with different options. All the options available will be stored in a file called "options.txt" along with their cost. You may assume that the file will not contain more than 30 options. The user should be able to select the car model, display options and prices, add options, remove options, or cancel the order. Allow the user to see all the available options and their prices. The program should always display the car model, cost, and the options ordered so far. If the user has not selected a car model, then an error message should be displayed indicating that the order has not started yet (e.g. NO MODEL SELECTED). A user should not be able to add more than 6 options to the car. The base prices of the three models: E ($10,000.00), L ($12,000.00), and X ($18,000.00). Implement the following menu options in separate functions: 1. Select a model (E, L, X) The user should enter either E, L, or X (either in lower or upper case). If the wrong character is entered, the user should be prompted repeatedly until the user enters a valid model. Update the order information after this selection. 2. Display available options and prices List all the options 3 per line. See below. 3. Add an option The user should enter an option such as "DVD System", "10 Speakers", etc. The option entered must be one of the options available. If it's not, the user should be prompted repeatedly until the user enters a valid option or enter "cancel". After the selection, the order information should be updated. (see sample input/output below). Duplicate options should not be allowed. 4. Remove an option Allow the user to remove one of the option from the list of options added earlier. Update the order information. If the option name is not in the list of options, then it should be ignored. 5. Cancel order Start over. Update the order information. 6. Quit

Hints: • Use an array/vector to store all the options along with an integer for the number of options read. • Use an array/vector to store all the options' prices. • Use an array/vector of strings for the options added along with an integer for the number of options ordered. • Write a function to convert a string to lowercase for comparison. • Write a function that returns true if an option is valid

Sample input/output: NO MODEL SELECTED 1. Select a model (E, L, X) 2. Display available options and prices 3. Add an option 4. Remove an option 5. Cancel order 6. Quit Enter choice: 3 NO MODEL SELECTED 1. Select a model (E, L, X) 2. Display available options and prices 3. Add an option 4. Remove an option 5. Cancel order 6. Quit Enter choice: 2 Prices for model E, L, & X: $10000.00, $12000.00, $18000.00 Available Options Leather Seats ($5000) DVD System ($1000) 10 Speakers ($800) Navigation System($1400) CarPlay ($500) Android Auto ($500) Lane Monitoring ($2000) 3/36 Warranty ($800) 6/72 Warranty ($999) Dual Climate ($1500) Body Side Molding($225) Cargo Net ($49) Cargo Organizer ($87) 450W Audio ($700) Heated Seats($1000) NO MODEL SELECTED 1. Select a model (E, L, X) 2. Display available options and prices 3. Add an option 4. Remove an option 5. Cancel order 6. Quit Enter choice: 1 Enter the model (E, L, X): l Model: L, $12000.00, Options: None CS 2400 HW 6, Bobcat Auto Dealership (60 points) Due: Wednesday June 19, 2019 1. Select a model (E, L, X) 2. Display available options and prices 3. Add an option 4. Remove an option 5. Cancel order 6. Quit Enter choice: 3 Enter option: 450w aUdIO Model: L, $12700.00, Options: 450W Audio 1. Select a model (E, L, X) 2. Display available options and prices 3. Add an option 4. Remove an option 5. Cancel order 6. Quit Enter choice: 3 Enter option: carplay Model: L, $13200.00, Options: 450W Audio, CarPlay 1. Select a model (E, L, X) 2. Display available options and prices 3. Add an option 4. Remove an option 5. Cancel order 6. Quit Enter choice: 4 Enter option to remove: carplay Model: L, $12700.00, Options: 450W Audio

The options.txt is formatted like this:

5000 Leather Seats
1000 DVD System
800 10 Speakers
1400 Navigation System
500 CarPlay
500 Android Auto
2000 Lane Monitoring
800 3/36 Warranty
999 6/72 Warranty
1500 Dual Climate
225 Body Side Molding
49 Cargo Net
87 Cargo Organizer
700 450W Audio
1000 Heated Seats

Answer 1

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <iomanip>
using namespace std;

//function signature
void showMenu();
char getModel();
void displaySelection(char model, double total, vector<string> &options);
bool isEqual(string str1, string str2);

// main function to run the program
int main() {
    // print a welcome message
   cout << "Welcome to Bobcats Auto Dealership" << endl;
   // declare variables
   int input = 0;
   char model = ' ';
   double total = 0;
   vector<int> price;
   vector<string> availableOption;
   vector<string> selectedOption;

   // read input from file
   ifstream file("options.txt");
   if (!file.is_open()) {
       cout << "Can not open File!" << endl;
       return -1;
   }
   while (!file.eof()) {
       // first input is price of option
       int cost;
       file >> cost; // get price of option
       // rest of line is option details
       string option;
       getline(file, option);
       // add price to price list
       price.push_back(cost);
       // add option
       if (option[0] == ' ') {
           option = option.substr(1, option.length() - 1); // ignore white space at start of option name
       }
       availableOption.push_back(option);
   }

   // show menu and ask for option till user select quit
   while (input != 6) {
       cout << endl; // print empty line
       // display user selected option
       displaySelection(model, total, selectedOption);
       // show menu for next selection
       showMenu();
       cin >> input; // get user input
       // check for valid input
       if (input < 0 || input>6) {
           cout << "Invalid input!" << endl;
       }
       // check for user input
       if (input == 1) {
           if (model == ' ') {
               model = getModel();
               // check the model and add cost
               if (model == 'E') {
                   total = 10000.0;
               }
               else if (model == 'L') {
                   total = 12000.0;
               }
               else {
                   // model is X
                   total = 18000.0;
               }
           }
       }
       else if (input == 2) {
           // print all options available
           cout << "Prices for model E, L, & X: $10000.00, $12000.00, $18000.00" << endl;
           cout << "Available Options" << endl;
           for (int i = 0; i < availableOption.size(); i++) {
               cout << availableOption.at(i) << "($" << price.at(i) << ")" << endl;
           }
       }
       else if (input == 3) {
           if (model != ' ') {
               cout << "Enter option: ";
               string option_name;
               cin.ignore(); // ignore newline character
               getline(cin, option_name); // get option name from user
               // check if option is available
               for (int i = 0; i < availableOption.size(); i++) {
                   if (isEqual(availableOption.at(i),option_name)) {
                       // check if user already selected that option
                       bool isSelected = false;
                       for (int j = 0; j < selectedOption.size(); j++) {
                           if (isEqual(availableOption.at(i),selectedOption.at(j))) {
                               isSelected = true; // set flag to true
                           }
                       }
                       // add option to selected option if not already selected
                       if (!isSelected) {
                           selectedOption.push_back(availableOption.at(i));
                           // add cost of option
                           total = total + price.at(i);
                       }
                   }
               }
           }
       }
       else if (input == 4) {
           if (model != ' ') {
               cout << "Enter option: ";
               string option_name;
               cin.ignore(); // ignore newline character
               getline(cin, option_name); // get option name from user
               // check if option is seleced
               for (int i = 0; i < selectedOption.size(); i++) {
                   if (isEqual(selectedOption.at(i),option_name)) {
                       // remove cost of option
                       for (int j = 0; j < availableOption.size(); j++) {
                           if (isEqual(selectedOption.at(i),availableOption.at(j))) {
                               total = total - price.at(j);
                           }
                       }
                       // remove option from selected option
                       selectedOption.erase(selectedOption.begin() + i);
                   }
               }
           }
       }
       else if (input == 5) {
           // cancel order and start new one
           model = ' ';
           total = 0;
           selectedOption.clear();
       }
   }

   return 0;
}

// function implementaion
void displaySelection(char model,double total, vector<string> &options) {
   // check if order is started
   if (model == ' ') {
       cout << "NO MODEL SELECTED" << endl;
   }
   else {
       // print model
       cout << "Model: " << model << ", $" << fixed << setprecision(2) << total << endl;
       cout << "Options: ";
       // check for options
       if (options.size() > 0) {
           // print all options
           for (int i = 0; i < options.size(); i++) {
               // print 3 options per line
               if (i != 0 && i % 3 == 0) {
                   cout << endl;
               }
               // print each option
               cout << options.at(i);
               // add commas
               if (i < options.size() - 1) {
                   cout << ", ";
               }
           }
       }
       else {
           cout << "None";
       }
       cout << endl; // print newline
   }
}

void showMenu() {
   cout << "1. Select a model(E, L, X)" << endl;
   cout << "2. Display available options and prices" << endl;
   cout << "3. Add an option" << endl;
   cout << "4. Remove an option" << endl;
   cout << "5. Cancel order" << endl;
   cout << "6. Quit" << endl;
   cout << "Enter choice: " << endl;
}

char getModel() {
   string model = "";
   cin.ignore(); // ignore newline character
   // promt user for model till valid model is selected
   while (true) {
       cout << "Enter the model (E, L, X): ";
       getline(cin, model);
       // check for valid model
       if (model.length() == 1) {
           char c = toupper(model[0]);
           if (c=='E' || c=='L' || c=='X') {
               model = "";
               model = model + c;
               break;
           }
       }
   }
   return model[0];
}

bool compareChar(char& c1, char& c2) {
   if (toupper(c1) == toupper(c2)) {
       return true;
   }
   else {
       return false;
   }
}
bool isEqual(string str1, string str2) {
   return (str1.size() == str2.size() && equal(str1.begin(), str1.end(), str2.begin(), &compareChar));
}

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

option.txt

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

5000 Leather Seats
1000 DVD System
800 10 Speakers
1400 Navigation System
500 CarPlay
500 Android Auto
2000 Lane Monitoring
800 3/36 Warranty
999 6/72 Warranty
1500 Dual Climate
225 Body Side Molding
49 Cargo Net
87 Cargo Organizer
700 450W Audio
1000 Heated Seats

let me know if you have any problem or want any modification in program.