ifstream problem

Code:

sprintf (fileName, "%s%d.sss", path, fileNo);

		inFile.open (fileName, ios::in);

		if (!inFile)
			cout << "error" << endl;

		else
		{
			cout << "Successfully opened file " << fileName;
			inFile.close ();
		}

Non-existent files don't flag the error! What on earth?!

I've changed the code so it uses FILE * now.
And the problem still exists.
According to this program, every conceivable filename exists on my humble little hard disk. Quite an achievment. Anyone want a file? Because according to my PC I possess every single file in the universe...

[/sarcasm]

Originally Posted by samGwilliam

Non-existent files don't flag the error! What on earth?!

Sure they do.

Code:

#include <iostream>
#include <string>
#include <fstream>

int main(void)
{
	std::string filename = "nothere.txt";
	std::ifstream infile;
	infile.open(filename.c_str(),std::ios::in);
	if (!infile)
		std::cout << "Error" << std::endl;
	else
		std::cout << "No error" << std::endl;

	return 0;
}

Code:

Output:
Error

On mine it doesn't. Unless I use a string literal:

Code:

inFile = fopen ("..............", "r");

It clearly says that doesn't exist. The other technique, however, will insist files that don't exist, do.

I JUST DISCOVERED IT HAS, HOWEVER, EITHER FILES, OR WIPED THE EXISTENNT ONES CLEAN. GOOD JOB I BACKED THEM UP!!!

Sorry about that. I've discovered the problem. I failed to use ios::nocreate. By the time I switched over to FILE* = file = fopen (etc), the files had already been created.

I'll bet you're using MSVC++ 6.0. I don't think nocreate is a standard flag. 6.0 was pretty terrible at conforming to ANSI. I'd say get a new compiler.

Originally Posted by pianorain

I'll bet you're using MSVC++ 6.0. I don't think nocreate is a standard flag. 6.0 was pretty terrible at conforming to ANSI. I'd say get a new compiler.

I am. That bad, eh?

Bollox.

Anyhow I got it working now. The program is a file to stitch all my reclaimed sectors together (I had to do a low level search and save them one by one - it took hours). It's working a treat - I can see all my beloved C projects I thought I'd lost coming back together. It's nice - it concatenates all consecutive filenames into single files.