Question

I want to run a loop, which will open all the files in folder and perform some operations on them. However, when I try to pass

"*.*"

in
stream.open()

, it doesn’t open any file. ( is_good() returns false )

fstream stream;
stream.open("*.*", fstream::out);

Answer 1

Use something like dirent.h or boost’s FileSystem Api to find out all the files in the directory *.* and store them in an std::vector or something. And then loop over the vector and open all of the files.

for(int i = 0; i < files.size(); i++)
{
   stream.open(files[i], fstream::out);
}