i have a few .c files, pro3.c is the only file that complies without a problem however when i go to compile the other ones i get a error message: warning useless storage class specifier in empty declaration, i was hoping someone could tell/show me what i am doing wrong.

prog3.c

node3.c

node2.c

node1.c

node0.c

1985 is calling, they want their code back. I'm not surprised if you're using a modern compiler and getting warnings about K&R style C.