ASCII input …

using System;
using System.Text;

class ASCIIEncodingExample {
public static void Main() {
// The encoding.
ASCIIEncoding ascii = new ASCIIEncoding();

// A Unicode string with two characters outside the ASCII code range.
String unicodeString =
“This Unicode string contains two characters ” +
“with codes outside the ASCII code range, ” +
“Pi (\u03a0) and Sigma (\u03a3).”;
Console.WriteLine(“Original string:”);
Console.WriteLine(unicodeString);

// Save positions of the special characters for later reference.
int indexOfPi = unicodeString.IndexOf(‘\u03a0’);
int indexOfSigma = unicodeString.IndexOf(‘\u03a3’);

// Encode string.
Byte[] encodedBytes = ascii.GetBytes(unicodeString);
Console.WriteLine();
Console.WriteLine(“Encoded bytes:”);
foreach (Byte b in encodedBytes) {
Console.Write(“[{0}]”, b);
}
Console.WriteLine();

// Notice that the special characters have been replaced with
// the value 63, which is the ASCII character code for ‘?’.
Console.WriteLine();
Console.WriteLine(
“Value at position of Pi character: {0}”,
encodedBytes[indexOfPi]
);
Console.WriteLine(
“Value at position of Sigma character: {0}”,
encodedBytes[indexOfSigma]
);

// Decode bytes back to string.
// Notice missing Pi and Sigma characters.
String decodedString = ascii.GetString(encodedBytes);
Console.WriteLine();
Console.WriteLine(“Decoded bytes:”);
Console.WriteLine(decodedString);
}
}

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2 thoughts on “ASCII input …

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