Question

Hey I am having trouble with this problem in C++:

The first race is tomorrow! You are provided a list of race entries in the following form:

vector<string> entryList = { "42, Vance Cardoza",
                             "55, Vanessa Pandara",
                             "36, Gaston Carlton",
                             "99, Rich Diesel",
                             "10, Euler Bustamente" };

In your main() function instantiate a Race object.

Use a C++ iterator to walk through the entries in the list above, parse out each car number and driver name and add them to the Race object using the AddRaceCar method.

My code so far:

#pragma once
#include <string>
#include <algorithm>
#include<iterator>
#include<vector>
#include <iostream>
#include <cstring>
#include <iostream>
#include <cstdlib>
#include <string>
#include <fstream>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
using namespace std;

class Car
{
public:
Car();
~Car();
string Make;
string Model;
int Year;
string Color;
float AverageMileage;

void FillErUp(unsigned int gallons);
float GetRemainingFuel();
float GetSpeed();
float SetSpeed(float newSpeed);

private:
float fuelTankCapacity;
float fuelLevel;
float speed;
};

class RaceCar : public Car{
public:

RaceCar CreateRacer(int CNumber, string DName) {
RaceCar();
~RaceCar();
int RaceCarNumber(int* x);
string DriverName(string* x);

}
};
class Race{
protected:
vector<RaceCar>cars;

public:
RaceCar * AddRaceCar(int RCNumber, string DrivName){
RaceCar *car;
DriverName *name;
}
public:
int& GetCarByNumber(int RCNumber){
return &RaceCarNumber;
}
public:
string PrintResults(int& finOrder, int& RCNumber) {

GetCarByNumber(*RaceCarNumber);
vector <int> finishOrder;
return cout << "The result of the race is: " << finishOrder + RaceCarNumber;
}

};
int main(){
int i;
vector <RaceCar> cars;
Race BigRace;
Car RaceCar;

vector<string> entryList = { "42, Vance Cardoza",
"55, Vanessa Pandara",
"36, Gaston Carlton",
"99, Rich Diesel",
"10, Euler Bustamente" };

for (int i = 0, j = 0; i < entryList.size(); i++)
{
if (entryList.at(i) == ',') //not sure why compiler is unable to identify ==
{
(entryList.at(i) = '(\0)');
cars.push_back(entryList.substr(j, i - j)); //pushing the sub string to int
j = i + 1;
}
}
}

vector<int> finishOrder = { 55, 99, 42, 10, 36 };

string PrintResults(finishOrder, cars);

}

please let me know what I need to change (pointers most likely) in order for it to compile / at least technically solve that part of the problem.

Answer 1

Hi. Although the question is not entirely clear, I believe the following main function is what it is asking for.
If this was a homework question where some of the code was provided, it does make sense as to why it doesn't compile. It is because many functions are either abstract or undefined. The following code gives the required main function asked in the original question:

#include <string>
#include <algorithm>
#include<iterator>
#include<vector>
#include <iostream>
#include <cstring>
#include <iostream>
#include <cstdlib>
#include <string>
#include <fstream>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>

using namespace std;

class Car
{
   public:
   // Car();
   // ~Car();
   string Make;
   string Model;
   int Year;
   string Color;
   float AverageMileage;

   void FillErUp(unsigned int gallons);
   float GetRemainingFuel();
   float GetSpeed();
   float SetSpeed(float newSpeed);

   private:
   float fuelTankCapacity;
   float fuelLevel;
   float speed;
};

class RaceCar : public Car
{
   public:
   int CarNumber;
   string DriverName;
   // RaceCar();
   // ~RaceCar();
   void CreateRacer(int CNumber, string DName)
   {
       // int RaceCarNumber(int* x);
       // string DriverName(string* x);
       CarNumber = CNumber;
       DriverName = DName;
   }
};

class Race
{
   protected:
   vector<RaceCar> cars;

   public:
   RaceCar * AddRaceCar(int RCNumber, string DrivName)
   {
       RaceCar *car;
       car->CreateRacer(RCNumber, DrivName);
       cars.push_back(*car);
       return car;
   }
   // int& GetCarByNumber(int RCNumber)
   // {
   //    return &RCNumber;
   // }
   // string PrintResults(int& finOrder, int& RCNumber)
   // {
   //    GetCarByNumber(*RaceCarNumber);
   //    vector <int> finishOrder;
   //    return cout << "The result of the race is: " << finishOrder + RaceCarNumber;
   // }
};

int main()
{
   int i;
   vector<RaceCar> cars;
   Race BigRace;
   Car RaceCar;

   vector<string> entryList = { "42, Vance Cardoza",
   "55, Vanessa Pandara",
   "36, Gaston Carlton",
   "99, Rich Diesel",
   "10, Euler Bustamente" };

   for (int j = 0; j < entryList.size(); j++)
   {
       for( int i = 0; i < entryList.at(j).size(); i++)
       {
           // cout<<entryList.at(i)[4];
           if (entryList.at(j)[i] == ',') //not sure why compiler is unable to identify ==
           {
               // (entryList.at(i) = '\0';
               BigRace.AddRaceCar(stoi(entryList.at(j).substr(0, i)),entryList.at(j).substr(i+1, entryList.at(j).size()));
           }
       }
   }

   // vector<int> finishOrder = { 55, 99, 42, 10, 36 };
   // string PrintResults(finishOrder, cars);
}

Please comment if any more clarification is required.