How to check if a file exists and is readable in C++?

Question

I\'ve got a fstream my_file(\"test.txt\"), but I don\'t know if test.txt exists. In case it exists, I would like to know if I can read it, too. How to do that?

I

Answer 1

What Operating System/platform?

On Linux/Unix/MacOSX, you can use fstat.

On Windows, you can use GetFileAttributes.

Usually, there is no portable way of doing this with standard C/C++ IO functions.