restrict是保留字吗,请看例子！

studyonly

select原型如下：
int select(int nfds,
fd_set *restrict readfds,
fd_set *restrict writefds,
fd_set *restrict errorfds,
  struct timeval *restrict timeout);

请问：restrict是什么意思here.

980501427

你搞错了.
在<sys/select.h>中定义如下:
[code:1]
extern int select (int __nfds, fd_set *__restrict __readfds,
                   fd_set *__restrict __writefds,
                   fd_set *__restrict __exceptfds,
                   struct timeval *__restrict __timeout) __THROW;
[/code:1]
原型是
[code:1]
int select(int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
       struct timeval *timeout);
[/code:1]
你把下划线搞丢了.