Question for a friend on file checking.

[indigo0086]

He wants to know how to check if a file exists and how would you check to see if that same file was empty as in having no data in it.

He basically wants to know which standard c++ library you are supposed to use?

he was thinking something like this

ifstream inFile("a:data", ios::nocreate)
if(!infile.Is_open())
//....whatever

he says
"The nocreate doesn't seem to be a member of ios anymore, giving errors. How can you do the same using another function, and not using stdio.h from C."

[Magos]

This is what I usually do (since I don't know of any function that checks if a file exists):

bool CheckFile(char* FileName)
{
   ifstream File();
   File.open(FileName, ios::in);
   if(!File.fail())
   {
      File.close();
      return true;
   }
   return false;
}

Since an infile-stream doesn't create a new file if it doesn't exist (what would it read ), it will always fail if the file doesn't exist.

[kuphryn]

Regarding file contents, seek the data pointer to the end of the file and get get the seek target size.

seekg(ios::end)
tellg()

Kuphryn