Mega Code Archive
Encode or decode a message
<![CDATA[
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Encode or decode a message.
using System;
public class Cipher {
public static int Main(string[] args) {
// see if arguments a present
if(args.Length < 2) {
Console.WriteLine("Usage: encode/decode word1 [word2...wordN]");
return 1; // return failure code
}
// if args present, first arg must be encode or decode
if(args[0] != "encode" & args[0] != "decode") {
Console.WriteLine("First arg must be encode or decode.");
return 1; // return failure code
}
// encode or decode message
for(int n=1; n < args.Length; n++) {
for(int i=0; i < args[n].Length; i++) {
if(args[0]=="encode")
Console.Write((char) (args[n][i] + 1) );
else
Console.Write((char) (args[n][i] - 1) );
}
Console.Write(" ");
}
Console.WriteLine();
return 0;
}
}
]]>