read line delimited floating numbers from a file

numbers.cpp

#include <iostream>
#include <fstream>
#include <stdlib.h>
using namespace std;

int main ()
{
  double arr[5];
  string tmp;
  int i = 0;

  ifstream fp("numbers.txt");

  while (fp >> tmp)
    arr[i++] = atof(tmp.c_str());

  while(--i>=0)
    cout << "Number " << i << " is " << arr[i] << endl;

  return 0;
}

Testfile

1.2
2.3
5.501
23.42
42.23