//Reads three numbers from the file infile.txt, sums the numbers,
//and writes the sum to the file outfile.txt.
#include <fstream>
using std::ifstream;
using std::ofstream;
using std::endl;

int main( )
{
    ifstream inStream;
    ofstream outStream;

    inStream.open("infile.txt");
    outStream.open("outfile.txt");

    int first, second, third;
    inStream >> first >> second >> third;
    outStream << "The sum of the first 3\n"
               << "numbers in infile.txt\n"
               << "is " << (first + second + third)
               << endl;

    inStream.close( );
    outStream.close( );

    return 0;
}