Create & Write C++ Files: Step-by-Step

In order to create a new file and write a program in C++, you need to use the file stream operator ofstream to create an output file stream object, and call its member function open() to open a new file. Then, you can use the << operator to write the program into the file.

Here is a simple example code:

#include <iostream>
#include <fstream>

int main() {
    std::ofstream outputFile; // 创建一个输出文件流对象

    outputFile.open("output.cpp"); // 打开一个名为"output.cpp"的文件

    // 将程序写入文件
    outputFile << "#include <iostream>\n\n";
    outputFile << "int main() {\n";
    outputFile << "    std::cout << \"Hello, World!\" << std::endl;\n";
    outputFile << "    return 0;\n";
    outputFile << "}\n";

    outputFile.close(); // 关闭文件

    std::cout << "程序已写入文件output.cpp" << std::endl;

    return 0;
}

After running the above code, a file named “output.cpp” will be created, which contains a simple C++ program printing “Hello, World!”.

Please note that you can also use the << operator of the ofstream object to write any other text or data to the file. Once you are done with the file operations, remember to call the close() function to close the file stream.

I hope this helps you! Feel free to let me know if you need any further assistance.