classes in C++

niteshadw · 07-05-2005, 07:42 AM

Hello,

I'm learning classes right now and I'm trying to read in a file that contains two strings, one has the name of a pet and the second contains what type of a pet is it. All of the pets should be read into an array of Pet objects, but I don't know how I should read the contents in, is it something like:

void fillArray(Cat*& catArray, int& size){
string n, t;
indexcout(0);

while(ifs << n << t){

if(indexcout == size)
expandArray(catArray, size);

catArray[indexcout].setName(n);
catArray[indexcout].setType(t);
}

I'm using a dynamic array of 'Cat', inside the cat I have the private string variables that hold the name and type of the pet...then I get the accessors and setters....which I'm trying to use to read into....I don't know if this is the correct way of doing it...

My next problem is accessing the contents once they are read...I want to be able to sort the array in ascending/descending order...how would I go about doing that?

Thank you..I'm new to C++, especially classes...I think vectors are the easiest and am able to do this using vectors but I want to know how to use classes...any help would be appreciated...thank you again

puishor · 07-05-2005, 08:51 AM

Don't really understood what is your problem , but I hope this would help.
If this is not what you seek for , post a reply , I would try to help you.

Code:

#include <iostream>
#include <fstream>
#include <stdio.h>
#include <string.h>

class Cat
{
   public:

   void SetName( char p[255]  )
   {
     strcpy( pet , p  );
   }

   void SetType( int n  )
   {
     type = n;
   }

   char* GetName()
   {
    return pet;
   }

   int GetType()
   {
    return type;
   }

   private:

    char pet[255];
    int type ;
};



Cat catArray[100];


int Read()
{
    //////////////////// Here read from file , formatted data , line by line.

  ifstream   f( "test.txt"  );
  char buffer[255]  ;
  int n = 0 ;
  char pet[255];
  int type ;


  while(! f.eof()  )
  {
      f.getline( buffer , 255  );
      sscanf( buffer , "%s %d" , pet , &type  );
      catArray[n].SetName( pet  );
      catArray[n++].SetType( type ) ;

  }
  ;

  return n;

}


void Display( int n  )
{
  for( int i =0  ; i < n; i++  )
  {
    cout << catArray[i].GetName() <<" - "<< catArray[i].GetType() <<  endl ;
  }
}

int main()
{
  Display( Read() ) ;
  return 0;
}

niteshadw · 07-05-2005, 07:05 PM

Thank for the reply...had an issue but just resolved it..sorry for the post