Files counting

[DrkJoker]

Hello, i'm a beginner in c++ programming and i need your help. I have a problem where i must count the files with .txt extension from a specified folder.
Thank you for your time.

[Stewbond]

You'll need to use something specific to your operating system or an external library. Nothing in STD C++ will do this.

I recommend the boost::filesystem library as it can be used in any operating system.

Once installed, you can do that with this function:

int count_files(std::string directory, std::string ext)
{
	namespace fs = boost::filesystem;
	fs::path Path(directory);
	int Nb_ext = 0;
	fs::directory_iterator end_iter; // Default constructor for an iterator is the end iterator

	for (fs::directory_iterator iter(Path); iter != end_iter; ++iter)
		if (iter->path().extension() == ext)
			++Nb_ext;

	return Nb_ext;
}

And this is how I'd use it:

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#include <boost/filesystem.hpp> #include <string> #include <iostream> int count_files(std::string, std::string); int main() { std::cout << count_files("c://temp",".cpp") << std::endl; std::cout << count_files("c://windows//System32",".dll") << std::endl; return 0; }

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You can get boost from here:
http://sourceforge.net/projects/boost/files/boost/1.49.0/
or from here
http://www.boost.org/users/download/

[4z0M4iN6]

You can do this:

You wite a c++ program, maybe LookupCount.exe
The Program should look at the second last entry of a temporary file, where it will find the count. This count the program should return (or print it also).

Then you write the following lines in a batch file (.cmd or .bat)

@echo off
dir file.txt > temp.txt
LookupCount .exe temp.txt
echo Count: %errorlevel%
del temp.txt

[DrkJoker]

Thank you. It worked.