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Linux教程網 >> Linux綜合 >> Linux資訊 >> Linux文化 >> 我這樣定義 公用體變量 為什麼編譯通不過?

我這樣定義 公用體變量 為什麼編譯通不過?

日期:2017/2/27 12:11:40   编辑:Linux文化

>>> 此貼的回復 >> 要麼你在前面聲明一個ftime 結構,要麼就像 struct { word ztime; word zdate; } zt;

>>> 此貼的回復 >> 在 /usr/include/sys/timeb.h 裡有

>>> 此貼的回復 >> timeb裡ftime這個結構如何定義的?

>>> 此貼的回復 >> timeb.h中,ftime是個函數名啊,timeb才是結構體

>>> 此貼的回復 >> TC吧? POSIX標准是utime,Linux支持。

>>> 此貼的回復 >> 在LINUX下輸入man ftime,得到如下結果: FTIME(3) Linux Programmer's Manual FTIME(3) NAME ftime - return date and time SYNOPSIS #include int ftime(struct timeb *tp); DESCRIPTION Return current date and time in tp, which is declared as follows: struct timeb { time_t time; unsigned short millitm; short timezone; short dstflag; }; Here time is the number of seconds since the epoch, millitm is the num- ber of milliseconds since time seconds since the epoch, timezone is the local time zone measured in minutes of time west of Greenwich, and dst- flag is a flag that, if nonzero, indicates that Daylight Saving time applies locally during the appropriate part of the year. These days the contents of the timezone and dstflag fields are unde- fined. RETURN VALUE This function always returns 0. BUGS This function is obsolete. Don't use it. If the time in seconds suf- fices, time(2) can be used; gettimeofday(2) gives microseconds; clock_gettime(3) gives nanoseconds but is not yet widely available. Under libc4 and libc5 the millitm field is meaningful. But early glibc2 is buggy and returns 0 there; glibc 2.1.1 is correct again.


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