// Reading data from a file
#include <iostream>
#include <fstream>
using namespace std;

int main () {

  ifstream fin("mydata.txt");
  double x, sum=0.0;

  for (int i=0; i<10; i++) {
    fin >> x;
    sum = sum + x;
  }

  fin.close();

  cout << "The sum of all values in mydata.txt is " << sum << endl;

}