file.h里已经包含了adm.h,为什么还是报错?
In file included from adm_add_tch.h:5:0,
from adm.h:5,
from menu.h:7,
from menu.c:1:
file.h:6:8: error: unknown type name ‘tp’
extern tp readfile(void);
^
file.h:7:1: warning: parameter names (without types) in function declaration
extern void writefile(tp);