Thread: How to do encryption in C

Originally Posted by sankarv

sorry. i could nt figure out the poblem. i was debugging for long time and im vexed. i am getting awkward values in debugging. just i want this encryption logic common for strings,numbers and special characters since all occur in a file.
pls help...

What Salem is getting at is make yourself a better code troubleshooter. Don't try and carry the 100Kg backpack all at once. Break it up into smaller and smaller units, THEN work through it line by line, watching your variables as you go.

Forget about the code that works, and concentrate on what doesn't - in this case, the numbers and other non letter, char's.

Post up what you find that's not right, and what you've tried to do to correct it.

I think numbers and other char's need to be treated a little differently than letters, in this program. What do you think?

Adak

CAN YOU HELP ME FOR WRITING A PROGRAM IN C ?
Encrypt the message “I LOVE DISCRETE” by translating the letters into numbers, applying the encryption function given below, and then translating the numbers back into letters. Additionally; find the corresponding decryption function, and apply it to the ciphertext to revert back to the original message