/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson
Publisher: Apress L.P.
ISBN: 1-893115-62-3
*/
// 04 - Exception Handling\Finally
// copyright 2000 Eric Gunnerson
using System;
using System.IO;
public class ExceptionHandlingFinally
{
public static void Main()
{
Processor processor = new Processor();
try
{
processor.ProcessFile();
}
catch (Exception e)
{
Console.WriteLine("Exception: {0}", e);
}
}
}
class Processor
{
int count;
int sum;
public int average;
void CalculateAverage(int countAdd, int sumAdd)
{
count += countAdd;
sum += sumAdd;
average = sum / count;
}
public void ProcessFile()
{
FileStream f = new FileStream("data.txt", FileMode.Open);
try
{
StreamReader t = new StreamReader(f);
string line;
while ((line = t.ReadLine()) != null)
{
int count;
int sum;
count = Convert.ToInt32(line);
line = t.ReadLine();
sum = Convert.ToInt32(line);
CalculateAverage(count, sum);
}
}
// always executed before function exit, even if an
// exception was thrown in the try.
finally
{
f.Close();
}
}
}
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