#include <iostream>
#include <fstream>

using namespace std;

void writesentence(ostream & of);
int readinteger(istream & ifs);

int main()
{
	ofstream outputfile;
	ifstream inputfile;
	outputfile.open("output.txt");
	inputfile.open("input.txt");
	writesentence(cout);
	cout<<"read in "<< readinteger(cin) << endl;
	inputfile.close();

	return 0;
}

void writesentence(ostream & of)
{
	of << "Hello World "<<endl;
}

int readinteger(istream & ifs)
{
	int myint;
	ifs >> myint;

	return myint;
}