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Re: [問題] union + struct + bitfield的問題

[ C_and_CPP ]16 留言, 推噓總分: +5

作者: EdisonX - 發表於 2012/06/18 01:48(13年前)

8^F推VictorTom:220/224,應該是為了讓double那個也確保能align到:)06/18 09:12

Re: [問題] union + struct + bitfield的問題

[ C_and_CPP ]9 留言, 推噓總分: +2

作者: rifiz - 發表於 2012/06/15 02:56(13年前)

2^F推VictorTom:有時候不是記憶體夠不夠大, 比如我要program MMIO或者06/15 09:18

3^F→VictorTom:利用bit-field分項設定; 當然不考慮可攜或跨平台的話,06/15 09:19

4^F→VictorTom:2/3F中間少句: HW command, 而HW就是需要這樣的06/15 09:20

5^F→VictorTom:要出driver的那個特定平台與編譯環境生得出想要的binary06/15 09:21

6^F→VictorTom:就好XD06/15 09:21

[問題] 有關模擬一離散機率質量函數的問題

[ C_and_CPP ]35 留言, 推噓總分: +7

作者: ace120kobe - 發表於 2012/06/15 00:38(13年前)

33^F推VictorTom:推l大, 如果不考律用stdlib的亂數夠不夠亂的問題, 他的06/15 02:02

34^F→VictorTom:質疑根本就是莫名其妙....XD06/15 02:03

[問題] link list清除問題

[ C_and_CPP ]6 留言, 推噓總分: +1

作者: freshair1219 - 發表於 2012/06/14 00:37(13年前)

1^F推VictorTom:temp->next = NULL; ?06/14 00:40

2^F→VictorTom:你是一個一個node create LinkList的, 同樣的也得要一個06/14 00:41

3^F→VictorTom:一個node去free掉....:)06/14 00:41

4^F→VictorTom:基本上是有點多此一舉沒錯.06/14 00:46

5^F→VictorTom:為什麼會error, 您可能要去看一書或查一下,06/14 00:47

6^F→VictorTom:什麼時候該用 . 而什麼時候該用 -> 這樣....:)06/14 00:47

[問題] union + struct + bitfield的問題

[ C_and_CPP ]67 留言, 推噓總分: +5

作者: rifiz - 發表於 2012/06/13 16:10(13年前)

8^F→VictorTom:你不就是定義bit-field嗎? 那自然是以bit為單位讀寫啊.06/14 00:27

9^F→VictorTom:是說通常disasm出來看, 還是用一些bit operation去讀/寫06/14 00:28

10^F→VictorTom:register, 然後整byte or 整UINT讀/寫回memory去....06/14 00:29

16^F→VictorTom:不太懂你說得是什麼, bit-field就是以其宣告的每一個06/14 00:56

17^F→VictorTom:BF的bit數寫起來, 然後照endian順序讀/寫進memory去...06/14 00:57

18^F→VictorTom:你想8bits/1byte為group的話, 可以試試06/14 00:58

19^F→VictorTom:用unsigned char來定義, ex: unsigned char p1:5 ...etc06/14 00:58

54^F推VictorTom:在小弟遇過的driver裡, bit-field多半與union併用, 常見06/17 01:07

55^F→VictorTom:於下command/mmio給HW(register); driver裡依狀況去讀寫06/17 01:07

56^F→VictorTom:bit-field對reg的各項參數做設定/取出; 但是mmio讀寫或06/17 01:09

57^F→VictorTom:下cmd buffer, 可能就以union起來的DWORD值(視HW而定)整06/17 01:10

58^F→VictorTom:段寫入(or讀出)....@_@"06/17 01:10

Re: [問題] 有關全域變數

[ C_and_CPP ]14 留言, 推噓總分: +4

作者: yoco315 - 發表於 2012/06/10 17:55(13年前)

5^F推VictorTom:推:)06/10 20:28

Re: [問題] 新手一問:C比較常被拿來寫什麼?

[ C_and_CPP ]8 留言, 推噓總分: +7

作者: legnaleurc - 發表於 2012/06/08 01:15(13年前)

8^F推VictorTom:推用C語言就好....XD06/08 21:20

Re: [問題] 光照下的物體顏色

[ C_and_CPP ]8 留言, 推噓總分: +4

作者: littleshan - 發表於 2012/06/04 12:04(13年前)

7^F推VictorTom:push~~:)06/04 23:27

[問題] Opengl無法解析的外部符號

[ C_and_CPP ]34 留言, 推噓總分: +5

作者: Nestarneal - 發表於 2012/05/30 17:15(13年前)

17^F推VictorTom:LIB那邊多加一個 OpenGL32.Lib 試試?05/30 23:52

18^F→VictorTom:link不到的func看起來都是GL core自己的, 不確定圖裡那05/30 23:52

19^F→VictorTom:些相關輔助的.lib有沒有誰有link OpenGL32.lib....@_@"05/30 23:53

[問題] C++ 不支援 %lf ?

[ C_and_CPP ]7 留言, 推噓總分: +5

作者: sjgau - 發表於 2012/05/29 13:35(13年前)

6^F推VictorTom:printf時用%f就可以了, scanf時才用%lf....@_@"05/30 23:46

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