Question

Write a program that uses a recursive function to encrypt a message by converting all lowercase characters to the next character
(with z transformed to a). You MUST NOT use any form of loop in your program!

Answer 1

/*done in c++. i have assumed that all the message contains ONLY lowercase characters..if there are other type of characters present, then simply add a filter in the if block*/
void encrypt(char message[], int index)
{
if (message[index]!=null)
{
if (message[index]=='z')
message[index]='a';
else
message[index]++;
encrypt(message,index+1);
}
}

Answer 2

Thank you for your help!