Count File in a folder (include subfolder)

jackventor

hi i want to know how much file are in a folder (include subfolder) i find some code in internet but all of them only count file in a folder and not its subfolder
like this codes

#include <stdio.h>
#include <dirent.h>

int main(int argc, char *argv[])
{
    if(argc != 2)
    {
        printf("Usage: ./count \"<path>\"\n");
        return 1;
    }

    struct dirent *de;
    DIR *dir = opendir(argv[1]);
    if(!dir)
    {
        printf("opendir() failed! Does it exist?\n");
        return 1;
    }

    unsigned long count=0;
        while(de = readdir(dir))
     {
          ++count;
     }

    closedir(dir);
    printf("%lu\n", count);

    return 0;
}

what is best and faster way to count all file in a folder and its subfolders?
thanks

SGaist

Hi and welcome to devnet,

Since you are using Qt, you should check QDirIterator.

jackventor

@SGaist is this code right?
it working

QDirIterator it("/sys/", QDir::Files, QDirIterator::Subdirectories);
    while (it.hasNext()) {
        if(it.next() > 0 )
        {
            howfile++;
        }
    }
    qDebug() << howfile;

i first try to just delete it.next() but its make while infinite

SGaist

Looks correct yes

KroMignon

@jackventor said in Count File in a folder (include subfolder):

is this code right?

I don't think so.
QDirIterator::next() is returning a QString containing file name, it is not a boolean!

This looks better to me:

QDirIterator it("/sys/", QDir::Files, QDirIterator::Subdirectories);
int fileCount= 0;
while (it.hasNext()) {
    it.next();
    ++fileCount;
}
qDebug() << fileCount << "files found";