DirectLineInput

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
using namespace std;
static void direct_line(ifstream& fin, int n, double *x, double *y) {
  string line;
  int c = 0;
  while (getline(fin, line))
    if (++c >= n) break;
  istringstream in(line);
  in >> *x >> *y;
}
int main() {
  double x, y;
  ifstream fin("dat");
  direct_line(fin, 10, &x, &y);
  fin.close();
  cout << x << ' ' << y << endl;
}