#include <qdir.h>#include <qstringlist.h>#include <iostream>using namespace std;int imageSpace(const QString &path){    QDir dir(path);    QStringList::Iterator it;    int size = 0;    QStringList files = dir.entryList("*.png *.jpg *.jpeg",                                      QDir::Files);    it = files.begin();    while (it != files.end()) {        size += QFileInfo(path, *it).size();        ++it;    }    QStringList dirs = dir.entryList(QDir::Dirs);    it = dirs.begin();    while (it != dirs.end()) {        if (*it != "." && *it != "..")            size += imageSpace(path + "/" + *it);        ++it;    }    return size;}int main(int argc, char *argv[]){    QString path = QDir::currentDirPath();    if (argc > 1)        path = argv[1];    cerr << "Space used by images in " << endl         << path.ascii() << endl         << "and its subdirectories is "         << (imageSpace(path) / 1024) << " KB" << endl;    return 0;}