Check out example codes for "c++ write new file". 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();
}

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