The Caesar cipher(https://de.wikipedia.org/wiki/Caesar-Verschlüsselung) served u.a.
in ancient times for the encryption of texts. In a Cäsar cipher,all characters of a character set (alphabet) are considered to bearranged in a ring, and each character is replaced by thatcharacter which has a given distance to the originalcharacter.
Example: The character set is the numbers 0 … 9. Then there arethe following substitutions for = 3:

Write a char * caesar function (const char text [], unsigned intk) that is used for
a given string (character array) text returns a pointer to
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