qq_crypt.c: In function `qq_encrypt':
qq_crypt.c:155: warning: static declaration of 'rand' follows non-static declaration
qq_crypt.c:153: warning: previous declaration of 'rand' was here
qq_crypt.c:159: warning: static declaration of 'encrypt_every_8_byte' follows non-static declaration
qq_crypt.c:154: warning: previous declaration of 'encrypt_every_8_byte' was here
qq_crypt.c: In function `qq_decrypt':
qq_crypt.c:236: warning: static declaration of 'decrypt_every_8_byte' follows non-static declaration
qq_crypt.c:235: warning: previous declaration of 'decrypt_every_8_byte' was here