open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

#include <iostream>
#include <fstream>
#include <dirent.h>

using namespace std;

int main() 
{
    DIR *dir;
    struct dirent *ent;
    if ((dir = opendir ("C:/Users/Inventex/Downloads/Code")) != NULL) 
    {
        while ((ent = readdir (dir)) != NULL) 
        {
            string name = ent->d_name;
            if(name.find(".txt") != string::npos)
            {
                ofstream outfile;
                outfile.open("C:/Users/Inventex/Downloads/Code/"+name);
                outfile << "//Coded by Inventex" << endl;
                outfile.close();
            }
        }
        closedir (dir);
    } 
    else 
    {
        cout << "Could not open the folder" << endl;
    }
    
    return 0;
}