untitled

// ConsoleApplication2.cpp : Defines the entry point for the console application.
//
#include<fstream>
#include<iostream>
#include<string>
#include<cstdlib>
#include<ctime>
#include "stdafx.h"

using namespace std;

int main()
{
    ifstream fin("rainfall.txt");
    double number = 0.0, sum = 0.0, average = 0.0;
    int count = 0;

    do
    {
        fin >> number;
        sum = sum + number;
        count++;


    } while (number != -999);

    average = sum / count;

    cout << "The average is " << average << endl;
    system("pause");
    return 0;
}