ChinaUnix.net
Ïà¹ØÎÄÕÂÍÆ¼ö:

staticºÍvolatile±äÁ¿

ÓÐʱÄãÏ£Íû¶¨ÒåÒ»¸öÀà³ÉÔ±£¬Ê¹ËüµÄʹÓÃÍêÈ«¶ÀÁ¢ÓÚ¸ÃÀàµÄÈκζÔÏó¡£Í¨³£Çé¿öÏ£¬Àà³ÉÔ±±ØÐëͨ¹ýËüµÄÀàµÄ¶ÔÏó·ÃÎÊ£¬µ«ÊÇ¿ÉÒÔ´´½¨ÕâÑùÒ»¸ö³ÉÔ±£¬ËüÄܹ»±»Ëü×Ô¼ºÊ¹Ó㬶ø²»±ØÒýÓÃÌØ¶¨µÄʵÀý¡£ÔÚ³ÉÔ±µÄÉùÃ÷Ç°Ãæ¼ÓÉϹؼü×Östatic(¾²Ì¬µÄ)¾ÍÄÜ´´½¨ÕâÑùµÄ³ÉÔ±¡£Èç¹ûÒ»¸ö³ÉÔ±±»ÉùÃ÷Ϊstatic£¬Ëü¾ÍÄܹ»ÔÚËüµÄÀàµÄÈκζÔÏó´´½¨Ö®Ç°±»·ÃÎÊ£¬¶ø²»±ØÒýÓÃÈκζÔÏó¡£Äã¿ÉÒÔ½«·½·¨ºÍ±äÁ¿¶¼ÉùÃ÷Ϊstatic¡£ static ³ÉÔ±µÄ×î³£¼ûµÄÀý×ÓÊÇmain( ) ¡£ÒòΪ...

by qbq - JavaÎĵµÖÐÐÄ - 2008-04-02 09:23:35 ÔĶÁ£¨308£© »Ø¸´£¨0£©

Ïà¹ØÌÖÂÛ

global.h int global = 0; extern.c °üº¬global.h main.c °üº¬global.h extern.c ºÍ main.cÖж¼includeÁËglobal.h£¬ÕâÑù±àÒëʱ±¨´í£¬globalÓжà¸ö¶¨Ò壬ÎÒµÄÀí½âÊÇglobal¶ÔÈ«¾Ö¶¼¿É¼û£¬¶à¸öcÎļþ°üº¬ÁËglobal.h, Ï൱ÓÚÖØ¸´¶¨Ò壻 ÈôÔÚglobal.hÖж¨Òå static int global = 0; Ôò±àÒëÁ´½Ó¶¼²»»á³ö´í£¬²¢ÇÒ£¬extern.cºÍmain.cÖдòÓ¡globalµÄµØÖ·ÊDz»Í¬µÄ£¬ÎÒÀí½âΪÕâʱÁ½¸öcÎļþÖÐÒýÓõÄglobalÊÇÁ½¸öͬÃûµ«×÷ÓÃÓò²»Í¬µÄ±äÁ¿£¬¸Ä...

by lzcxh - C/C++ - 2009-04-17 16:36:50 ÔĶÁ£¨976£© »Ø¸´£¨5£©

ÓÐЩÅóÓѲ»Ì«Çå³þstatic±äÁ¿ºÍ·½·¨µÄʹÓã¬Ìش˾ÙÀý˵Ã÷ [code]public class Teststatic { public int i; public static int j; }[/code] ʹÓõÄʱºò, Teststatic ts1 = new Teststatic(); ts1.i = 3; ts1.j = 5; Teststatic ts2 = new Teststatic(); ts2.i = 7; ts2.j = 9; // also modified ts1.j System.out.println(ts1.i); //=3 System.out.println(ts1.j); //=9 System.out.println(ts2.i); //=7 System.out.pri...

by perryhg - Java - 2005-05-22 22:01:11 ÔĶÁ£¨2130£© »Ø¸´£¨3£©

[code]void varfunction() { int var=0; static int static_var =0; printf("var equal %d \n",var); printf("static var equal %d \n",static_var); printf("\n"); var++; static_var++; } main() { int i; for (i=0;i<2;i++) varfunction(); } [/code] Ö´ÐÐÈçÏ£º [code]var equal 0 static var equal 0 var equal 0 static var equal 1 [/code] ÊéÉÏ˵δÉùÃ÷µÄ±äÁ¿¶¼ÊôÓÚautoÐ͵ģ¬ÄÇôÎÒÒÔǰ±à³ÌÖеıäÁ¿¶¼ÊÇautoÐÍ...

by ×ó¿´ÓÖ¿´ - C/C++ - 2003-08-16 14:56:26 ÔĶÁ£¨1483£© »Ø¸´£¨3£©

ava™ ÓïÑÔ°üº¬Á½ÖÖÄÚÔÚµÄͬ²½»úÖÆ£ºÍ¬²½¿é£¨»ò·½·¨£©ºÍ volatile ±äÁ¿¡£ÕâÁ½ÖÖ»úÖÆµÄÌá³ö¶¼ÊÇΪÁËʵÏÖ´úÂëÏ̵߳ݲȫÐÔ¡£ÆäÖÐ volatile ±äÁ¿µÄͬ²½ÐԽϲµ«ÓÐʱËü¸ü¼òµ¥²¢ÇÒ¿ªÏú¸üµÍ£©£¬¶øÇÒÆäʹÓÃÒ²¸üÈÝÒ׳ö´í¡£ÔÚÕâÆÚµÄ Java ÀíÂÛÓëʵ¼ù ÖУ¬Brian Goetz ½«½éÉܼ¸ÖÖÕýȷʹÓà volatile ±äÁ¿µÄģʽ£¬²¢Õë¶ÔÆäÊÊÓÃÐÔÏÞÖÆÌá³öһЩ½¨Òé¡£ Java ÓïÑÔÖÐµÄ volatile ±äÁ¿¿ÉÒÔ±»¿´×÷ÊÇÒ»ÖÖ ¡°³Ì¶È½ÏÇáµÄ synchro...

by welkin - JavaÎĵµÖÐÐÄ - 2009-07-17 13:25:18 ÔĶÁ£¨840£© »Ø¸´£¨0£©

¼ÈÈ»¶þÕßÔÚ³ÌÐòÔËÐÐÆÚ¼ä¶¼ÊǿɼûµÄ£¬ÄÇÓÐÊ²Ã´Çø±ð£¿Íû´ïÈËÖ¸µã£¿

by ºÚ¿à¿§·È - C/C++ - 2005-12-05 18:41:26 ÔĶÁ£¨2048£© »Ø¸´£¨4£©

1.staticÐÞÊÎÒ»¸öÊôÐÔ×Ö¶Î,ÄÇôÕâ¸öÊôÐÔ×ֶν«³ÉΪÀà±¾ÉíµÄ×ÊÔ´,publicÐÞÊÎΪ¹²ÓеÄ,¿ÉÒÔÔÚÀàµÄÍⲿͨ¹ýtest.aÀ´·ÃÎÊ´ËÊôÐÔ;ÔÚÀàÄÚ²¿Èκεط½¿ÉÒÔʹÓÃ.Èç¹û±»ÐÞÊÎΪprivate˽ÓÐ,ÄÇôֻÄÜÔÚÀàÄÚ²¿Ê¹ÓÃ. ¡¡¡¡public class Test{ public static int a; private Test(){ a=0; } } ¡¡¡¡Èç¹ûÊôÐÔ±»ÐÞÊÎΪstatic¾²Ì¬Àà×ÊÔ´,ÄÇôÕâ¸ö×Ö¶ÎÓÀÔ¶Ö»ÓÐÒ»¸ö,Ò²¾ÍÊÇ˵²»¹ÜÄãnew test()¶àÉÙ¸öÀàµÄ¶ÔÏó,²Ù×÷µÄÓÀÔ¶¶¼Ö»ÊÇÊôÓÚÀàµÄÄÇÒ»¿éÄÚ´æ×Ê...

by lish94 - JavaÎĵµÖÐÐÄ - 2008-04-19 22:36:55 ÔĶÁ£¨515£© »Ø¸´£¨0£©

CÓïÑÔÈ«¾Ö±äÁ¿ºÍº¯Êý¶¨ÒåstaticÓÐʲôÓã¿

by ATmega32 - C/C++ - 2007-08-04 19:20:54 ÔĶÁ£¨3041£© »Ø¸´£¨2£©

±¾ÎÄÀ´×ÔChinaUnix²©¿Í£¬Èç¹û²é¿´Ô­ÎÄÇëµã£ºhttp://blog.chinaunix.net/u/29346/showart_325578.html

by huqwstar53 - JavaÎĵµÖÐÐÄ - 2007-06-21 10:04:09 ÔĶÁ£¨365£© »Ø¸´£¨0£©

µ±ÔÚ³ÌÐòÖн«Ò»¸ö±äÁ¿ÉùÃ÷Ϊstatic±äÁ¿Ê±£¬Ëü»á×Ô¶¯±»³õʼ»¯Îª0»òNULL¡£ ÇëÎÊ£¬ÔÚÕâ¸ö¹ý³ÌÖУ¬¼ÆËã»úÊÇÔõÑù¹¤×÷µÄ£¿

by TheTeeth - C/C++ - 2008-05-03 00:50:05 ÔĶÁ£¨1170£© »Ø¸´£¨2£©

Here is the code: [code] #include #include #include using namespace std; class Person { private: static const int _age = 20; static vector _elems ; public: static void getAge(); }; void Person::getAge() { cout << _age << endl; //error occure here, _elems.size() can not be resolved. cout << _elems.size() << endl; } ...

by CottonXu - C/C++ - 2005-11-06 08:30:31 ÔĶÁ£¨1136£© »Ø¸´£¨6£©