#include <iostream>
#include <fstream>   //for class ofstream
#include <cstdlib>   //for EXIT_SUCCESS and EXIT_FAILURE
using namespace std;

//This C++ program creates an output file named outfile.txt
//in the current directory.

void f();   //The function declaration announces the name of the function.

int main()
{
	f();
	return EXIT_SUCCESS;
}

void f()    //The function definition creates the function.
{
	ofstream outfile {"outfile.txt"}; //The constructor opens the file.

	outfile << "Hello.\n";            //Use outfile like cout.
	outfile << "Goodbye.\n";
}                                         //The destructor closes the file.