File Reader/Writer in C++

Below is an example of how you can use C++'s ofstream and ifstream classes to read from and write to a file.

// Include iostream and fstream                    
#include 

int main() {
    // Replace "input.txt" and "output.txt" with your file names
    std::string inputFile = "input.txt";
    std::string outputFile = "output.txt";

    // Reading from a file using ifstream
    std::ifstream inputFileStream(inputFile);
    if (inputFileStream.is_open()) {
        std::string line;
        while (getline(inputFileStream, line)) {
            std::cout << "Read from file: " << line << std::endl;

            // You can process the line as needed here
        }
        inputFileStream.close();
    } else {
        std::cerr << "Error reading from file." << std::endl;
    }

    // Writing to a file using ofstream
    std::ofstream outputFileStream(outputFile);
    if (outputFileStream.is_open()) {
        // Replace the following line with the content you want to write
        std::string contentToWrite = "Hello, this is written to the file!";
        outputFileStream << contentToWrite << std::endl;

        std::cout << "Write to file: " << contentToWrite << std::endl;

        outputFileStream.close();
    } else {
        std::cerr << "Error writing to file." << std::endl;
    }

    return 0;
}