#ifndef OWN_USEREC
struct userec {   ...

#ifndef OS_64BIT
    unsigned int userlevel;
#endif
    time_t lastlogin;
    time_t stay;
#ifdef OS_64BIT /*  align 8 bytes... */
    unsigned int userlevel;
#endif

...}

这个userlevel咋这样定义呢？
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