Special Linking Array Items - Secret Message Decryption

Program Steps

Special Linking Array Items You are provided with a file called secret1.dat which contains a secret message. The first byte of file will indicate how many letters are in the message. This will be followed by all the letters, one byte for each, and all the indexes – one byte for each and one extra as the starting index value. Your job is to follow the letters from the starting position until all the letters have been printed. You will need two BYTE arrays – both of size 256. The first one will be named letters, and a second array will be named index. You will write your program to follow the links, traversing them to locate and print the letters in the correct order. You must read the initial data from the test file – hard coding the data is not allowed. This program will perform the following steps: a) Ask the user for the name of the data file. (use ReadString) b) Open the file using the OpenInputFile library function. Make sure you save the file handle returned in EAX because you will need it later c) Using the ReadFromFile library function, read the first byte into a msgLength variable. d) Using the ReadFromFile library function, read the next msgLength bytes into the letters array. e) Using the ReadFromFile library function, read the next (msgLength+1) bytes from the file into the index array. f) Close the file connection using the file handle and the CloseFile library function