This program uses an fstream object to write data to a file.

// This program uses an fstream object to write data to a file.
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
fstream dataFile;
cout << "Opening file...\n";
dataFile.open("demofile.txt", ios::out); // Open for output
cout << "Now writing data to the file.\n";
dataFile << "Jones\n"; // Write line 1
dataFile << "Smith\n"; // Write line 2
dataFile << "Willis\n"; // Write line 3
dataFile << "Davis\n"; // Write line 4
dataFile.close(); // Close the file
cout << "Done.\n";
return 0;
}