Génération automatique des fichiers .txt en C++

filenameN.txt

#include <fstream>
#include <sstream>

int main(){
    for (unsigned i = 0; i < 10; i++) {
        std::ostringstream oss;
        oss << "filename" << i << ".txt";
        std::string filename = oss.str();
        std::ofstream ofs(filename);
        if (ofs) {
            ofs << "coucou" << i << std::endl;
            ofs.close();
        }   
    }   
    return 0;
}

std::tmpfile