I am trying to write to a file, read from the file and then print to console:

#include 
#include 
#include 

int main() {
    //open/create a text file
    std::fstream myFile("messagelogs.txt", std::ios::out | std::ios::in | std::ios::app);

    //write to file
    myFile << "Hello World\nBye World\n" << std::endl;

    //read from file
    std::string readFile;
    std::getline(myFile, readFile);
    while (myFile) {
        std::cout << readFile << '\n';
        std::getline(myFile, readFile);
    }

    //close file
    myFile.close();

    return 0;
}

The problem is that when I run the code, nothing is printing on the console, although it successfully writes to the file.

When I was debugging, I found that nothing is written to the file until myFile.close(); , so readFile is null and nothing prints on the console.

I was wondering why the text isn't being written to the file after myFile << "Hello World\nBye World\n" << std::endl; rather than when the file is closed?

I was also wondering how I can fix this problem - should I close the file after writing and then reopen the file to read again?