Best 2!

#include <iostream>
#include <cmath>
#include <fstream>

using namespace std;

int main()
{
ifstream f("1.txt");
ifstream g("2.txt");
ofstream h("3.txt");
double a, b, c;
while(!f.eof())
{
f >> a;
g >> b;
c = (a + b) / 2;
h << c << " ";
}
f.close();
g.close();
h.close();
system("pause");
return 0;
}