Help encrpyt message to lower case

[chenejm]

1. Write a function with the following prototype:
void toLowerCase( char [ ] );
The function receives a string as argument and converts all the upper-case letters in the string to lower-case. Any character in the string that is not in upper-case, e.g. lower-case or non-alphabet character will remain unchanged.
2. Write a function that decrypts the message. The function prototype is given below:
void decrypt( char msg[ ] );
3. Write a main function to test your functions in the following steps:
1. Get the original message: Today a Nobel laureate will visit SAU.
2. Call toLowerCase
3. Display the resulting message
4. Call encrypt
5. Display the resulting message
6. Call decrypt
7. Display the resulting message

[ui uiho]

convert is
c = tolower(c);
for simple encryption just do
if(!isspace(c)) c += 3;// moves letter c up 3 letters so if it is a it is now d
skip use isspace because you do not want to change spaces. make sure to include ctype.h
decryption is the just c -= 3;