Check out example codes for "create new file c++". It will help you in understanding the concepts better.

Code Example 1

#include <iostream>
#include <fstream>
using namespace std;

int main() {
  // Create and open a text file
  ofstream MyFile("filename.txt");

  // Write to the file
  MyFile << "Files can be tricky, but it is fun enough!";

  // Close the file
  MyFile.close();

Learn ReactJs, React Native from akashmittal.com