Write a C program according to the description of Programming Projects Q$15$ of

Chapter $8,$ on page $180$ of the textbook.

The maximum length of the user message is $150$ characters.

Example Interaction $($user input is underlined; your program must follow this format

precisely$)$:

$ $./$a$.$out

Enter message to be encrypted: Go ahead, make my day.

Enter shift amount $(1-25,$ enter $0$ to stop$)$: $0$

$

$ $./$a$.$out

Enter message to be encrypted: Go ahead, make my day.

Enter shift amount $(1-25,$ enter $0$ to stop$)$: $3$

Encrypted message: Jr dkhdg$,$ pdnh pb gdb$.$

Enter message to be encrypted: Jr dkhdg$,$ pdnh pb gdb$.$

Enter shift amount $(1-25,$ enter $0$ to stop$)$: $23$

Encrypted message: Go ahead, make my day.

Enter message to be encrypted: $0$

Enter shift amount $(1-25,$ enter $0$ to stop$)$: $0$

$

$$./$a$.$out

Enter message to be encrypted: Alice was beginning to get very tired of sitting by her

sister on the bank, and of having nothing to do: once or twice she had peeped into the

book her sister was reading, but it had no pictures or conversations in it$,`$and what is

the use of a book,$\text{'}$ thought Alice $`$without pictures or conversation?$\text{'}$

Enter shift amount $(1-25,$ enter $0$ to stop$)$: $3$

Encrypted message: Dolfh zdv ehjlqqlqj wr jhw yhub wluhg ri vlwwlqj eb khu vlvwhu rq

wkh edqn, dqg ri kdylqj qrwklqj wr gr: rqfh ru wzlfh vkh kdg shhshg lqwr wkh errn k

Enter message to be encrypted: Any message

Enter shift amount $(1-25,$ enter $0$ to stop$)$: $0$

$