help me write this in C

PARTICIPATION PROJECT L12 Turn in by 11:59pm today. Include comments at top listing name and codeword. Hard-code a string of your choice. Print out your string. Generate a random key of chars the same length as your string. Print out the key Exclusive OR (XOR) each character in your string with the corresponding character in the random key to generate ciphertext. Print the ciphertext. Exclusive OR (XOR) each character in the ciphertext with the corresponding character in the random key to generate the original text. Print out the original text. Watch out for the impact of the XOR and random generation on null string terminators