write to file in C++

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

ifstream file_variable; //ifstream is for input from plain text files
file_variable.open("input.txt"); //open input.txt

file_variable.close(); //close the file stream
/*
Manually closing a stream is only necessary
if you want to re-use the same stream variable for a different
file, or want to switch from input to output on the same file.
*/
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//You can also use cin if you have tables like so:
while (cin >> name >> value)// you can also use the file stream instead of this
{
 cout << name << value << endl;
}
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//ifstream file_variable; //ifstream is for input from plain text files
ofstream out_file;
out_file.open("output.txt");

out_file << "Write this scentence in the file" << endl;

ofstream myfile;
myfile.open("file.txt");

myfile << "write this to file"

    #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();
}