计算文件夹中的文件（包括子文件夹）

Question

hi i use Qt and 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;
}

i find this code here , it only count file in a folder and not its subfoler
anyone can help me
edit 1
i test this code from this page, it working but it can edit for less cpu usage?

Answer 1

The following code runs for Qt.

QStringList nameFilters;
nameFilters << "*.jpg";
QDirIterator it(QDir::currentPath(), nameFilters, QDir::Files, QDirIterator::Subdirectories);
while (it.hasNext()) {
    qDebug() << it.next();
}

use nameFilters << "*"; if you want to know all the files in the parent directory and its sub-directories.

Answer 2

sumit_smk code is ok but its need a little edit for your case
here is the code you can use

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