C++ Fileoperations: copy the file name and content of 10 files in another

The copy_files() function first creates a new std::ofstream object called output and opens the file “new_file.txt”. It then uses a loop to iterate over the 10 text files, creating the file name using an std::ostringstream object and reading the content of each file using an std::ifstream object and an std::stringstream object. It then writes the file name and content to the new file using the << operator. Note that we include newline characters and extra whitespace for readability. In the main() function, we call copy_files().

#include <iostream>
#include <fstream>
#include <sstream>

void copy_files() {
    std::ofstream output("new_file.txt");
    for (int i = 1; i <= 10; i++) {
        std::ostringstream file_name_stream;
        file_name_stream << "file_" << i << ".txt";
        std::string file_name = file_name_stream.str();
        std::ifstream input(file_name);
        std::stringstream buffer;
        buffer << input.rdbuf();
        std::string content = buffer.str();
        output << "File name: " << file_name << "\nContent: " << content << "\n\n";
    }
    output.close();
}

int main() {
    copy_files();
    return 0;
}