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

Since C++11 it's possible to use implicit operator bool instead of good():

ifstream my_file("test.txt");
if (my_file) {
  // read away
}