C++ Tutorials - Absolute n00b spoonfeed

Hi guys, how are you?

Would anyone please write the following program:

Code: Select all

Design a structure called car that holds the following information about an automobile:
its make, as a string in a character array or in a string object, and the year it was built,
as an integer. Write a program that asks the user how many cars to catalog. The program
should then use new to create a dynamic array of that many car structures. Next, it
should prompt the user to input the make (which might consist of more than one word)
and year information for each structure. Note that this requires some care because it
alternates reading strings with numeric data (see Chapter 4). Finally, it should display
the contents of each structure. A sample run should look something like the following:
How many cars do you wish to catalog? 2
Car #1:
Please enter the make: Hudson Hornet
Please enter the year made: 1952
Car #2:
Please enter the make: Kaiser
Please enter the year made: 1951
Here is your collection:
1952 Hudson Hornet
1951 Kaiser


Here's what I've been desperately and unsuccessfully trying to do:

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#include "stdafx.h"
#include <iostream>
#include <string>



struct cars
{
   string maker;
   int year;
};


using namespace std;

int main()
{
   cout <<"How many cars do you wish to catalog; ";
   int user;
   cin >> user;
   cars member[user];
   int counter = 0;
   for(counter; counter < user; counter++)
   {
      system("cls");
      cout << "\nMaker: ";
      getline(cin, member[counter].maker);
      cout <<"\nYear: ";
   }
   counter = 0;

   for(counter; counter < user ; counter++)
   {
      cout << "Here's your catalog: \n";
      cout<< member[counter].year <<" "<< member[counter].maker <<endl;
   }

   system("pause");
   return 0;
}


Obviously I haven't included the new thing at all, so would anyone please make this work and hopefully explain how creating run-time storage and putting data there works:)

Regards,
Jack

Well all right, since you took the effort of trying yourself

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// car.h

#ifndef CAR_H
#define CAR_H

#include <iostream>
#include <string>
#include <limits>


struct Car
{
private:
   std::string make;
   int year;
   static int cars;

public:
   Car();
   friend std::ostream & operator<<(std::ostream &, const Car &);
   static int getInput(const char *);
};

#endif


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// car.cpp

#include "car.h"

using std::cout;
using std::cin;
using std::ostream;
using std::streamsize;
using std::numeric_limits;


int Car::cars = 0;

Car::Car()
{
   ++cars;
   cout << "Car #" << cars << ":\nPlease enter the make: ";
   getline(cin, make);
   year = getInput("Please enter the year made: ");
}

ostream & operator<<(ostream &o, const Car &car)
{
   o << car.year << ' ' << car.make << '\n';
   return o;
}

int Car::getInput(const char *msg)
{
   int input;

   while (cout << msg && !(cin >> input))
   {
      cin.clear();
      cin.ignore(numeric_limits<streamsize>::max(), '\n');
   }
   cin.ignore(numeric_limits<streamsize>::max(), '\n');
   return input;
}


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// main.cpp

#include "car.h"

using std::cout;
using std::cin;
using std::nothrow;


int main()
{
   size_t cars = Car::getInput("How many cars do you wish to catalog? ");
   Car *pcars = new (nothrow) Car[cars];

   if (pcars)
   {
      cout << "Here is your collection:\n";
      for (size_t i = 0; i < cars; ++i)
         cout << pcars[i];
      delete[] pcars;
   }
   else
      cout << "Memory allocation error!\n";
   cin.get();
}


Thanks a lot for this man, but seems pretty old school to me

Jack Sparrow wrote:Thanks a lot for this man, but seems pretty old school to me

I did exactly what was asked in the program requirements.
If it seems so old school to you, then I wonder why you couldn't solve this one yourself, or improve my 'old school' solution? Laziness?
Well thanks for letting me know that you won't be needing my help again. Good luck with your state of the art programming techniques!

I thought structures couldn't be private

C++ wrote:

Jack Sparrow wrote:Thanks a lot for this man, but seems pretty old school to me

I did exactly what was asked in the program requirements.
If it seems so old school to you, then I wonder why you couldn't solve this one yourself, or improve my 'old school' solution? Laziness?
Well thanks for letting me know that you won't be needing my help again. Good luck with your state of the art programming techniques!

Don't misunderstand me here. I'm very grateful for your help, absolutely. It's just that the code 'style' you've used is kinda different from the tutorials I've watched and the books I've been reading.

Anyways, I've kinda managed to do a program that can do pretty much the same thing, just that I avoided using memory allocation, instead I used file input/output to store the data. Not that neat but it works after all:)

Anyway, thanks mate:)