C language

The Caesar Cipher was a way of coding correspondence used by Julius Caesar. Encryption involves swapping each unencrypted letter with the letter shifted N positions left. When the range is exceeded, the alphabet is wrapped around. Write a function implementing the variation of the Caesar cypher, which assumes that subsequent shifts are the successive numbers of your album number (ignore letters). When the numbers from the album number run out, start from the beginning. The function should have two arguments: unencrypted string and album number, the function should return an encrypted string. Use the Latin alphabet, only lowercase letters. Spaces should remain unencrypted. For example in the case of N=3, the letter 'e' is replaced with 'b', and letter 'c' is replaced with 'z