// Michael Eaton
// Tue Jul 02 2002 18:34:59
// MessageOfTheDay
// Reads a random line from a text file that is in the form
// of 1 "message" per line and prints it to the screen.
using System;
using System.IO;
public class MessageOfTheDay {
public static void Main(string[] args) {
string theFile;
// read from the arg list
if (args.Length != 0) {
theFile = args[0];
} else {
Console.WriteLine("usage: motd.exe <filename>");
return;
}
if (File.Exists(theFile)) {
Console.WriteLine(getMessage(theFile));
} else {
Console.WriteLine("The file: '{0}' does not exist.", theFile);
}
}
private static string getMessage(string fileName) {
int currentLine = 0;
string text;
StreamReader file = new StreamReader(fileName);
Random generator = new Random();
// this will give us a line between 0 and N where N is the number of lines
// in the file.
int randomNum = Convert.ToInt32((getNumberOfLines(fileName) * generator.NextDouble()) + 1);
// we need to loop through the file and return the randomNum line
while((text = file.ReadLine()) != null) {
currentLine++;
if (currentLine == randomNum) {
file.Close();
return text;
}
}
file.Close();
return "none";
}
private static int getNumberOfLines(string filename) {
// counts the number of lines in a file
StreamReader file = new StreamReader(filename);
int lines = 0;
while(file.ReadLine() != null) {
lines++;
}
file.Close();
return lines;
}
}
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