CSE230 Projects

• Project 4: encryption and decryption
  Here's my code to encrypt and decrypt a single character. You must also provide the checksum value each time you call either of these functions.

    char encryptChar( int iChecksum0, char c0 )
      {
      int iChar = (int)c0;
      int iEncodedChar = (iChar - 32 + iChecksum0) % 95 + 32;
      char cEncodedChar = (char)iEncodedChar;
      return cEncodedChar;
      }
  
    char decryptChar( int iChecksum0, char c0 )
      {
      int iChar = (int)c0;
      int iDecodedChar = (iChar - 32 - iChecksum0) % 95 + 32 + 95;
      if( iDecodedChar > 126 )
        iDecodedChar -= 95;
      char cDecodedChar = (char)iDecodedChar;
      return cDecodedChar;
      }