Question

This is for my c++ class and I would really appreciate the help, Thank you!

Complete the definitions of the functions for the ConcessionStand class in the ConcessionStand.cpp file. The class definition and function prototypes are in the provided ConcessionStand.h header file. A testing program is in the provided main.cpp file. You don’t need to change anything in ConcessionStand.h or main.cpp, unless you want to play with different options in the main.cpp program.

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Main.cpp

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#include "ConcessionStand.h"
#include <iostream>

using namespace std;

int main() {

  ConcessionStand standA{"Pizzeria"};

  standA.addItemToMenu("Cheese", 3.50, 1);
  standA.addItemToMenu("Veggie", 4.50, 2);
  standA.addItemToMenu("Pepperoni", 4.50, 3);
  standA.addItemToMenu("Mushroom", 4.50, 1);

  standA.displayMenu();
  standA.sellMenuItem(1);
  standA.sellMenuItem(4);
  standA.displayMenu();
  standA.sellMenuItem(1);
  
  if (!standA.printInventoryToFile())
    cout << "\nCould not print inventory to file!\n";

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ConcessionStand.cpp

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#include "ConcessionStand.h"
#include <iostream>
#include <iomanip> // std::setw(), std::setprecision(), std::fixed, std::left
#include <fstream>
#include <string>
#include <vector>


// constructors


// change information


// get information

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ConcessionStand.h
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#include <string>
#include <vector>

#ifndef CONCESSION_STAND
#define CONCESSION_STAND


class ConcessionStand {

public:
  ConcessionStand(){};
  ConcessionStand(std::string); // name of stand 
  void displayMenu() const;
  bool printInventoryToFile() const;
  void addItemToMenu(std::string, double, unsigned int);
  void sellMenuItem(unsigned int);

private:
  std::vector<std::string> products;
  std::vector<double> prices;
  std::vector<unsigned int> quantity;
  std::string standName;
  
};

#endif

Answer 1

//please get back to me in case of any issues
//always happy to help
//thanks

#include "ConcessionStand.h"
#include <iostream>
#include <iomanip> // std::setw(), std::setprecision(), std::fixed, std::left
#include <fstream>
#include <string>
#include <vector>
#include <stdio.h>

using namespace std;

// constructors

// change information

// get information

ConcessionStand::ConcessionStand(std::string standName){
   this->standName = standName;
}

void ConcessionStand::displayMenu() const{
   cout<<"--------------MENU-----------------"<<endl;
   vector<double>::const_iterator pricesIt = this->prices.begin();
   vector<unsigned int>::const_iterator quantityIt = this->quantity.begin();
   for(vector<string>::const_iterator it = this->products.begin(); it != this->products.end(); it++){
       cout<<*it<<" ------- "<<*pricesIt<<" ------- "<<*quantityIt<<endl;
       pricesIt++;
       quantityIt++;
   }
}

void ConcessionStand::addItemToMenu(std::string item,double price,unsigned int quantity){
   this->products.push_back(item);
   this->prices.push_back(price);
   this->quantity.push_back(quantity);
  
   cout<<"new product added !!!"<<endl;
}

void ConcessionStand::sellMenuItem(unsigned int item){
  
   item = item -1;
  
   if(item>this->products.size()){
   cout<<"ERROR !!!! , No such item"<<endl;
       return;
   }
  
   if(this->quantity[item] == 0){
       cout<<"ERROR !!!! , not enough left"<<endl;
       return;
   }
   else if(this->quantity[item] == 1){
       this->products.erase(this->products.begin()+item);
       this->prices.erase(this->prices.begin()+item);
       this->quantity.erase(this->quantity.begin()+item);
       cout<<"item sold!!!!"<<endl;
   }
   else{
       this->quantity[item]=this->quantity[item]-1;
       cout<<"item sold!!!!"<<endl;
   }
}

bool ConcessionStand::printInventoryToFile() const{
   FILE* ptr;
   ptr=fopen("Inventory.text","w");
   if(ptr == NULL){
       cout<<"could not open file"<<endl;
       return false;
   }
  

  
   for(int i=0;i<this->products.size();i++){
       int a=this->quantity[i];
       double p=this->prices[i];
       std::string str=this->products[i];
       const char* cstr=str.data();
       fprintf(ptr,"%s %u %d\n",cstr,p,a);
   }
  
   return true;
}