Thread: Why wont this Class File I/O work

Ive uploaded a file, it has the class member functions on it from my project, ListOfObjects::save() is the one giving me the trouble, for some reason it wont let me save the contents of an array of a type object which itself is made up of two different object types. If you have a look you will see what i mean, maybe im coming at it from the wrong angle but i cant seem to get it right.

Any help will be much appreciated.

Thanks

Here it is

Code:

int ListOfObjects::save( ostream & out )
{
	ofstream ObjectsFile( "Objects.dat", ios::out);

	int Index = 0;

	if( !ObjectsFile )
	{
		cerr << "File could not be opened" << endl;

	}

	for( Index = 0; Index < cCount; Index++ )
		{
			ObjectsFile << cList[Index];
		}
	return 0;
}

You have a functin parametr that you never use. Plus I would do it another way. This is how I would implement a saving function:

Code:

#include <string.h>     // strcpy()
#include <fstream.h>  // file i/o

class Stuff
{
   public:
      Stuff();
      int save(Stuff *sPtr);
      char string[10];
      char stringTwo[10];
      int num;

};

/* Constructor */
Stuff::Stuff()
{
   for(int i = 0; i < 10; i++)
   {
      string[i] = 0;
      stringTwo[i] = 0;
   }
   num = 0;
}

/* Save Member Function */
int Stuff::save(Stuff *sPtr)
{
   ofstream outfile("Outfile.txt");

   if( !outfile )
   {
      cerr << "Couldn't open file" << endl;
      return 1;
   }

   outfile << sPtr->string << endl
              << sPtr->stringTwo << endl
              << sPtr->num << endl;

   outfile.close();  // I don't trust destructors

   return 0;
}

int main()
{
   Stuff stuffObject;

   strcpy(stuffObject.string, "Hello");
   strcpy(stuffObject.stringTwo, "Yo");
   stuffObject.num = 10;

   stuffObject.save(&stuffObject);

   return 0;
}

Hope that helps.

Thanks alot m8, ill let you know how i get on.