In C++ we have several methods and functions for reading from and writing to files. In the code snippet provided, you'll see the basic methods for these operations.

First, we create a 'ofstream' object named 'MyFile'. The ofstream object is used to open a file for writing. We then use the '<<' operator to write data to the file, and finally call the close() method to close it.

To read from a file, we use a 'ifstream' object named 'MyReadFile'. The ifstream is used for reading files. We use the getline() function to read the file line by line and write something for each line. Similar to the write operation, we end it by calling the close() method.

This is comparable to submitting a form on a website. When you hit the submit button, your data is packaged and sent off to be saved in a database. This can be compared to the write operation. The data is then fetched from the database when needed, which mirrors the read operation in our file handling.

Remember, results speed and efficiency will depend on the size of the file and the number of times these operations are executed. This basic introduction should give you an understanding of the methods used in C++ file input and output.

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#include <iostream>

#include <fstream>

using namespace std;

int main() {

  ofstream MyFile("example.txt");

  MyFile << "This is written to the file";

  MyFile.close();

  string line;

  ifstream MyReadFile("example.txt");

  while (getline (MyReadFile, line)) {

    cout << line;

  }

  MyReadFile.close();

  return 0;

}