#include <fstream.h>
#include <iostream.h>
#include <stdlib.h>

void two_sum(ifstream& srcfile)
{
   int n1, n2;
   srcfile >> n1 >> n2;
   cout << (n1 + n2) << endl;
}

void main()
{
    ifstream in_stream;

    in_stream.open("infile.dat");
    if (in_stream.fail())
    {
        cout << "Input file opening failed.\n";
        exit(1);
    }

    two_sum(in_stream);
    in_stream.close();
}