Computer science code Watch
For example, if we use the keyword GCSE then we make up the key phrase for COMPUTINGISFUN by repeating the letters within GCSE to make a 14 letter code, GCSEGCSEGCSEGC, where G is the 7th letter of the alphabet, C the 3rd, S the 19th and E the 5th.
Analyse the requirements for this program and design, develop, test and evaluate a program to enter, encrypt and decrypt messages. You must use a high-level language to implement this encryption technique. The program must be able to accept keywords of any length. Consider how you will deal with spaces in the original message.