锘??xml version="1.0" encoding="utf-8" standalone="yes"?>AV在线亚洲男人的天堂 ,亚洲成人免费电影,亚洲女同成av人片在线观看http://m.tkk7.com/lihao336/category/47963.html鎴愪簬鍧氬繊錛屾瘉浜庢誕韜?/description>zh-cnWed, 14 Dec 2011 00:28:04 GMTWed, 14 Dec 2011 00:28:04 GMT60[杞琞unix/linux涓殑dup()緋葷粺璋冪敤http://m.tkk7.com/lihao336/archive/2011/12/13/366231.htmlcalvincalvinTue, 13 Dec 2011 06:20:00 GMThttp://m.tkk7.com/lihao336/archive/2011/12/13/366231.htmlhttp://m.tkk7.com/lihao336/comments/366231.htmlhttp://m.tkk7.com/lihao336/archive/2011/12/13/366231.html#Feedback0http://m.tkk7.com/lihao336/comments/commentRss/366231.htmlhttp://m.tkk7.com/lihao336/services/trackbacks/366231.html聽聽聽 sys_dup()鐨勪富瑕佸伐浣滃氨鏄敤鏉モ滃鍒垛濅竴涓墦寮鐨勬枃浠跺彿錛屼嬌涓や釜鏂囦歡鍙烽兘鎸囧悜鍚屼竴涓枃浠躲傛棦鐒惰綆鍗曪紝鎴戜滑灝遍鍏堟潵鐪嬩竴涓嬪畠鐨勪唬鐮侊紙瀹氫箟鍦╢s/fcntl.c涓級(jí)錛?br />
聽1asmlinkage聽long聽sys_dup(unsigned聽int聽fildes)
聽2{
聽3聽聽聽聽int聽ret聽=-EBADF;
聽4聽聽聽聽struct聽file聽*聽file聽=聽fget(fildes);
聽5
聽6聽聽聽聽if聽(file)
聽7聽聽聽聽聽聽聽聽ret聽=聽dupfd(file,聽0);
聽8聽聽聽聽return聽ret;
聽9}
10

鑰宻ys_dup()鐨勪富浣撴槸dupfd()錛堝畾涔夊湪鍚屼竴涓枃浠朵腑錛夛細(xì)

聽1staticint聽dupfd(struct聽file聽*file,聽int聽start)
聽2{
聽3聽聽聽聽struct聽files_struct聽*聽files聽=聽current->files;
聽4聽聽聽聽int聽ret;
聽5
聽6聽聽聽聽ret聽=聽locate_fd(files,聽file,聽start);
聽7聽聽聽聽if聽(ret聽<0)
聽8聽聽聽聽聽聽聽聽goto聽out_putf;
聽9聽聽聽聽allocate_fd(files,聽file,聽ret);
10聽聽聽聽return聽ret;
11
12out_putf:
13聽聽聽聽write_unlock(&files->file_lock);
14聽聽聽聽fput(file);
15聽聽聽聽return聽ret;
16}
17

娉細(xì)dup鍜宒up2鐨勫師鍨嬪涓嬶細(xì)
#include <unistd.h>

int dup(int file_descriptor);
int dup2(int file_descriptor1, int file_descriptor2)
dup榪斿洖鐨勬枃浠舵弿榪扮鎬繪槸鍙栨渶灝忕殑鍙敤鍊?br />dup2榪斿洖鐨勬枃浠舵弿榪扮鎴栬呬笌file_descriptor2鐩稿悓錛屾垨鑰呮槸絎竴涓ぇ浜庤鍙傛暟鐨勫彲鐢ㄥ箋?/font>

聽聽聽 鑰岃繖涔堜竴涓畝鍗曠殑緋葷粺璋冪敤鏄浣曞畬鎴愰噸瀹氬悜榪欎釜鑹板法鐨勪換鍔$殑鍛紵鎴戜滑涓嶅Θ鍏堢湅涓緥瀛愩?br />聽聽聽 褰撴垜浠湪shell涓嬭緭鍏ュ涓嬪懡浠わ細(xì)鈥渆cho hello!鈥濓紝榪欐潯鍛戒護(hù)瑕佹眰shell榪涚▼鎵ц涓涓彲鎵ц鏂囦歡echo錛屽弬鏁頒負(fù)鈥渉ello!鈥濄傚綋shell鎺ユ敹鍒板懡浠や箣鍚庯紝鍏堟壘鍒? bin/echo錛岀劧鍚巉ork()鍑轟竴涓瓙榪涚▼璁╀粬鎵цbin/echo錛屽茍灝嗗弬鏁頒紶閫掔粰瀹冿紝鑰岃繖涓繘紼嬩粠shell緇ф壙浜?jiǎn)涓変釜鏍囧噯鏂囦挥灱屽嵪x爣鍑嗚緭鍏? 錛坰tdin錛夛紝鏍囧噯杈撳嚭錛坰tdout錛夊拰鏍囧噯鍑洪敊淇℃伅錛坰tderr錛夛紝浠栦滑涓変釜鐨勬枃浠跺彿鍒嗗埆涓?銆?銆?銆?/font>鑰岃嚦浜巈cho榪涚▼鐨勫伐浣滃緢綆鍗曪紝灝辨槸灝嗗弬鏁扳渉ello!鈥濆啓鍒版爣鍑嗚緭鍑烘枃浠朵腑鍘伙紝閫氬父閮芥槸鎴戜滑鐨勬樉紺哄櫒涓娿備絾鏄鏋滄垜浠皢鍛戒護(hù)鏀規(guī)垚鈥渆cho hello! > foo鈥濓紝鍒欏湪鎵ц鏃惰緭鍑哄皢浼?xì)琚噸瀹氬悜鍒凹倎鐩樻枃錃gfoo涓?font color="#0000FF">錛堟敞錛氶噸瀹氬悜浜庢枃浠舵弿榪扮鏈夊叧錛?/font>銆傛垜浠亣瀹氬湪姝や箣鍓嶈shell榪涚▼鍙湁涓変釜鏍囧噯鏂囦歡鎵撳紑錛屾枃浠跺彿鍒嗗埆涓?銆?銆?錛屼互涓婂懡浠よ灝嗘寜濡備笅搴忓垪鎵ц錛?br />聽聽聽 (1) 鎵撳紑鎴栧垱寤虹鐩樻枃浠秄oo錛屽鏋渇oo涓師鏉ユ湁鍐呭錛屽垯娓呴櫎鍘熸潵鍐呭錛屽叾鏂囦歡鍙蜂負(fù)3銆?br />聽聽聽 (2) 閫氳繃dup()澶嶅埗鏂囦歡stdout錛屽嵆灝嗘枃浠跺彿1鍑虹殑file緇撴瀯鎸囬拡澶嶅埗鍒版枃浠跺彿4澶勶紝鐩殑鏄皢stdout鐨刦ile鎸囬拡鏆傛椂淇濆瓨涓涓?br />聽聽聽 (3) 鍏抽棴stdout錛屽嵆1鍙鋒枃浠訛紝浣嗘槸鐢變簬4鍙鋒枃浠跺stdout涔熷悓鏃舵湁涓紩鐢紝鎵浠tdout鏂囦歡騫舵湭鐪熸鍏抽棴錛屽彧鏄吘鍑?鍙鋒枃浠跺彿浣嶇疆銆?br />聽聽聽 (4) 閫氳繃dup()錛屽鍒?鍙鋒枃浠訛紙鍗崇鐩樻枃浠秄oo錛夛紝鐢變簬1鍙鋒枃浠跺叧闂紝鍏朵綅緗┖緙猴紝鏁?鍙鋒枃浠惰澶嶅埗鍒?鍙鳳紝鍗寵繘紼嬩腑鍘熸潵鎸囧悜stdout鐨勬寚閽堟寚鍚戜簡(jiǎn)foo銆?br />聽聽聽 (5) 閫氳繃緋葷粺璋冪敤fork()鍜宔xec()鍒涘緩瀛愯繘紼嬪茍鎵цecho錛屽瓙榪涚▼鍦ㄦ墽琛宔cho鍓嶅鍏抽棴3鍙峰拰4鍙鋒枃浠訛紝鍙暀涓?銆?銆?涓変釜鏂囦歡錛岃娉ㄦ剰錛岃繖 鏃剁殑1鍙鋒枃浠跺凡緇忎笉鏄痵tdout鑰屾槸紓佺洏鏂囦歡foo浜?jiǎn)銆傚綋echo鎯沖悜stdout鏂囦歡鍐欏叆鈥渉ello!鈥濇椂鑷劧灝卞啓鍏ュ埌浜?jiǎn)foo涓?br />聽聽聽 (6) 鍥炲埌shell鍚庯紝鍏抽棴鎸囧悜foo鐨?鍙蜂笌3鍙鋒枃浠舵枃浠訛紝鍐嶇敤dup()鍜宑lose()灝?鍙鋒仮澶嶈嚦stdout錛岃繖鏍穝hell灝辨仮澶嶄簡(jiǎn)0銆?銆?涓変釜鏍囧噯杈撳叆/杈撳嚭鏂囦歡銆?br />
聽聽聽 鐢辨鍙錛?font color="#FF0000">褰揺cho紼嬪簭錛堟垨鍏朵粬錛夊湪榪愯鐨勬椂鍊欏茍涓嶇煡閬搒tdout錛堝浜巗tdin鍜宻tderr鍚屾牱錛夋寚鍚戜粈涔堬紝榪涚▼涓庡疄闄呰緭鍑烘枃浠舵垨璁懼鐨勭粨鍚堟槸鍦ㄨ繍琛屾椂鐢卞叾鐖惰繘紼嬧滃寘鍔炩濈殑銆傝繖鏍峰氨綆鍖栦簡(jiǎn)瀛愯繘紼嬬殑紼嬪簭璁捐錛屽洜涓哄湪璁捐鏃跺彧瑕佽窡涓変釜閫昏緫涓婂瓨鍦ㄧ殑鏂囦歡鎵撲氦閬撳氨鍙互浜?/font>銆傚彲鑳芥湁浜轟細(xì)瑙夊緱榪欏緢鍍忛潰鍚戝璞′腑 鐨勫鎬佸拰閲嶈澆錛屾病鏈変粈涔堟柊濂囦箣澶勶紝浣嗘槸濡傛灉浣犳椿鍦?0鐢氳嚦40騫村墠錛屽彲鑳戒綘浼?xì)鏀瑰彉浣犵殑鐪嬫硶銆偮?

calvin 2011-12-13 14:20 鍙戣〃璇勮
]]>
灝忕瀛樺偍鍜屽ぇ绔瓨鍌?/title><link>http://m.tkk7.com/lihao336/archive/2011/11/15/363850.html</link><dc:creator>calvin</dc:creator><author>calvin</author><pubDate>Tue, 15 Nov 2011 07:36:00 GMT</pubDate><guid>http://m.tkk7.com/lihao336/archive/2011/11/15/363850.html</guid><wfw:comment>http://m.tkk7.com/lihao336/comments/363850.html</wfw:comment><comments>http://m.tkk7.com/lihao336/archive/2011/11/15/363850.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/lihao336/comments/commentRss/363850.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/lihao336/services/trackbacks/363850.html</trackback:ping><description><![CDATA[鎵鏈夌綉緇滃崗璁兘鏄噰鐢╞ig endian鐨勬柟寮忔潵浼犺緭鏁版嵁鐨勩傛墍浠ユ湁鏃舵垜浠篃浼?xì)鎶奲ig endian鏂瑰紡縐頒箣涓虹綉緇滃瓧鑺傚簭銆傚綋涓ゅ彴閲囩敤涓嶅悓瀛楄妭搴忕殑涓繪満閫氫俊鏃訛紝鍦ㄥ彂閫佹暟鎹箣鍓嶉兘蹇呴』緇忚繃瀛楄妭搴忕殑杞崲鎴愪負(fù)緗戠粶瀛楄妭搴忓悗鍐嶈繘琛屼紶杈撱? <p><wbr>聽<wbr>聽<wbr>聽鍒ゆ柇灝忕榪樻槸澶х瑙勫垯鐨勬柟娉曪細(xì)</wbr></wbr></wbr></p><p><wbr>int x = 1;<br /><wbr>if(*(char *)&x == 1)//鍙杧鎸囬拡寮哄埗杞崲涓篶har*綾誨瀷鍐嶅彇鍊鹼紝姝ゆ椂鍙栧埌鐨勫兼槸int鏈浣庡瓧鑺傚?br /><wbr>聽<wbr>聽<wbr>聽<wbr>聽printf(鈥渓ittle-endian\n鈥?;<br /><wbr>else<br /><wbr>聽<wbr>聽<wbr>聽<wbr>聽printf(鈥渂ig-endian\n鈥?;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p><wbr></wbr></p><p><wbr>聽<wbr>聽<wbr>聽<wbr>聽鍙﹀琛ュ厖錛?/wbr></wbr></wbr></wbr></p><p>1錛嶣IG-ENDIAN銆丩ITTLE-ENDIAN銆佽窡CPU鏈夊叧鐨勶紝姣忎竴縐岰PU涓嶆槸BIG-ENDIAN灝辨槸LITTLE- ENDIAN銆併侷A鏋舵瀯鐨凜PU涓槸Little-Endian錛岃孭owerPC 銆丼PARC鍜孧otorola澶勭悊鍣ㄣ傝繖鍏跺疄灝辨槸鎵璋撶殑涓繪満瀛楄妭搴忋傝岀綉緇滃瓧鑺傚簭鏄寚鏁版嵁鍦ㄧ綉緇滀笂浼犺緭鏃舵槸澶уご榪樻槸灝忓ご鐨勶紝鍦↖nternet鐨勭綉緇滃瓧 鑺傚簭鏄疊IG-ENDIAN銆傛墍璋撶殑JAVA瀛楄妭搴忔寚鐨勬槸鍦↗AVA铏氭嫙鏈轟腑澶氬瓧鑺傜被鍨嬫暟鎹殑瀛樻斁欏哄簭錛孞AVA瀛楄妭搴忎篃鏄疊IG-ENDIAN銆?/p><p>2錛庢墍浠ュ湪鐢–/C++鍐欓氫俊紼嬪簭鏃訛紝鍦ㄥ彂閫佹暟鎹墠鍔″繀鐢╤tonl鍜宧tons鍘繪妸鏁村瀷鍜岀煭鏁村瀷鐨勬暟鎹繘琛屼粠涓繪満瀛楄妭搴忓埌緗戠粶瀛楄妭搴忕殑杞崲錛岃屾帴 鏀舵暟鎹悗瀵逛簬鏁村瀷鍜岀煭鏁村瀷鏁版嵁鍒欏繀欏昏皟鐢╪tohl鍜宯tohs瀹炵幇浠庣綉緇滃瓧鑺傚簭鍒頒富鏈哄瓧鑺傚簭鐨勮漿鎹€傚鏋滈氫俊鐨勪竴鏂規(guī)槸JAVA紼嬪簭銆佷竴鏂規(guī)槸C/C++紼? 搴忔椂錛屽垯闇瑕佸湪C/C++涓渚т嬌鐢ㄤ互涓婂嚑涓柟娉曡繘琛屽瓧鑺傚簭鐨勮漿鎹紝鑰孞AVA涓渚э紝鍒欎笉闇瑕佸仛浠諱綍澶勭悊錛屽洜涓篔AVA瀛楄妭搴忎笌緗戠粶瀛楄妭搴忛兘鏄疊IG- ENDIAN錛屽彧瑕丆/C++涓渚ц兘姝g‘榪涜杞崲鍗沖彲錛堝彂閫佸墠浠庝富鏈哄簭鍒扮綉緇滃簭錛屾帴鏀舵椂鍙嶅彉鎹級(jí)銆傚鏋滈氫俊鐨勫弻鏂歸兘鏄疛AVA錛屽垯鏍規(guī)湰涓嶇敤鑰冭檻瀛楄妭搴忕殑闂? 棰樹簡(jiǎn)銆?/p><p><br /></p><p>杞嚜<a >http://www.embest.net/index.php/archives/259</a><br /></p><img src ="http://m.tkk7.com/lihao336/aggbug/363850.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/lihao336/" target="_blank">calvin</a> 2011-11-15 15:36 <a href="http://m.tkk7.com/lihao336/archive/2011/11/15/363850.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>socket绔彛bind闂http://m.tkk7.com/lihao336/archive/2011/09/11/358464.htmlcalvincalvinSun, 11 Sep 2011 15:47:00 GMThttp://m.tkk7.com/lihao336/archive/2011/09/11/358464.htmlhttp://m.tkk7.com/lihao336/comments/358464.htmlhttp://m.tkk7.com/lihao336/archive/2011/09/11/358464.html#Feedback0http://m.tkk7.com/lihao336/comments/commentRss/358464.htmlhttp://m.tkk7.com/lihao336/services/trackbacks/358464.html$ netstat -tln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address聽聽聽聽聽聽聽聽聽聽 Foreign Address聽聽聽聽聽聽聽聽 State聽聽聽聽聽 聽聽
tcp聽聽聽聽聽聽聽 0聽聽聽聽聽 0 127.0.0.1:631聽聽聽聽聽聽聽聽聽聽 0.0.0.0:*聽聽聽聽聽聽聽聽聽聽聽聽聽聽 LISTEN聽聽聽聽
tcp聽聽聽聽聽聽聽 0聽聽聽聽聽 0 0.0.0.0:40700聽聽聽聽聽聽聽聽聽聽 0.0.0.0:*聽聽聽聽聽聽聽聽聽聽聽聽聽聽 LISTEN聽聽聽聽
tcp6聽聽聽聽聽聽 0聽聽聽聽聽 0 ::1:631聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 :::*聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 LISTEN

鏄劇ず娌ind鍒?3绔彛錛屽嵈bind鍒頒簡(jiǎn)涓涓殢鏈虹殑绔彛40700涓娿?br />鍚庢潵蹇界劧鎰忚瘑鍒?-1023鏄繚鐣欑鍙e彿錛屾槸涓嶆槸鍥犱負(fù)13灞炰簬reserved port鐨勫師鍥狅紵
淇敼bind绔彛涓?000鍚庯紝鏋滅劧鍙互bind浜?jiǎn)銆?br />
鍘熸潵1-1023鏄痳eserved port鏄互榪欑鏂瑰紡瀹炵幇鐨勶紝鑰屼互root鏉冮檺榪愯紼嬪簭錛屽垯鍙互bind涓?023浠ヤ笅鐨勭鍙c?br />
榪欑瘒鏂囩珷涓嶉敊鐨勶細(xì)
http://www.cnblogs.com/zhangleiccst/archive/2011/05/14/2046465.html


calvin 2011-09-11 23:47 鍙戣〃璇勮
]]>
[杞琞sprintf snprintf strcpy memcpy 鍖哄埆鍙?qiáng)搴旂?/title><link>http://m.tkk7.com/lihao336/archive/2011/09/11/358442.html</link><dc:creator>calvin</dc:creator><author>calvin</author><pubDate>Sun, 11 Sep 2011 06:45:00 GMT</pubDate><guid>http://m.tkk7.com/lihao336/archive/2011/09/11/358442.html</guid><wfw:comment>http://m.tkk7.com/lihao336/comments/358442.html</wfw:comment><comments>http://m.tkk7.com/lihao336/archive/2011/09/11/358442.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/lihao336/comments/commentRss/358442.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/lihao336/services/trackbacks/358442.html</trackback:ping><description><![CDATA[http://hi.baidu.com/liziyun537/blog/item/ae84671a6a75e9d9ac6e754e.html<br /><br />鍏充簬sprintf鍜宻nprintf鐨勬紜嬌鐢?br /><br /> 鑰冭檻浠ヤ笅鏈夌己闄風(fēng)殑渚嬪瓙錛?br /> void f(const char *p)<br /> {<br /> char buf[11]={0};<br /> sprintf(buf,"%10s",p); // very dangerous<br /> printf("%sn",buf);<br /> }<br /><br /> 涓嶈璁╂牸寮忔爣璁扳?10s鈥濊瀵間綘銆傚鏋減鐨勯暱搴﹀ぇ浜?0涓瓧絎︼紝閭d箞 sprintf() 鐨勫啓鎿嶄綔灝變細(xì)瓚婅繃buf鐨勮竟鐣岋紝浠庤屼駭鐢熶竴涓紦鍐插尯婧㈠嚭銆?br /> 媯(gè)嫻嬭繖綾葷己闄峰茍涓嶅鏄擄紝鍥犱負(fù)瀹冧滑鍙湪 p 鐨勯暱搴﹀ぇ浜?0涓瓧絎︾殑鏃跺欐墠浼?xì)鍙戠敓銆傞粦瀹㈤氬父鍒╃敤榪欑被鑴嗗急鐨勪唬鐮佹潵鍏ヤ鏡鐪嬩笂鍘誨畨鍏ㄧ殑緋葷粺銆?br /><br /> 瑕佷慨姝h繖涓緙洪櫡錛?b>鍙互浣跨敤鍑芥暟 snprintf()浠f浛鍑芥暟sprintf()</b>銆?br /><br /> 鍑芥暟鍘熷瀷錛歩nt snprintf(char *dest, size_t n, const char *fmt, ...);<br /> 鍑芥暟璇存槑: 鏈澶氫粠婧愪覆涓嫹璐漬錛?涓瓧絎﹀埌鐩爣涓蹭腑錛岀劧鍚庡啀鍦ㄥ悗闈㈠姞涓涓?銆傛墍浠ュ鏋滅洰鏍囦覆鐨勫ぇ灝忎負(fù)n鐨勮瘽錛屽皢涓嶄細(xì)婧㈠嚭銆?br /> 鍑芥暟榪斿洖鍊? 鑻ユ垚鍔熷垯榪斿洖瀛樺叆鏁扮粍鐨勫瓧絎︽暟錛岃嫢緙栫爜鍑洪敊鍒欒繑鍥炶礋鍊箋?br /><br /> 鎺ㄨ崘鐨勭敤娉曪細(xì)<br /> void f(const char *p)<br /> {<br /> char buf[11]={0};<br /> snprintf(buf, sizeof(buf), "%10s", p); // 娉ㄦ剰錛氳繖閲岀2涓弬鏁板簲褰撶敤sizeof(str)錛岃屼笉瑕佷嬌鐢ㄧ‖緙栫爜11錛屼篃涓嶅簲褰撲嬌鐢╯izeof(str)-1鎴?0<br /> printf("%sn",buf);<br /> }<br /><br /> strcpy 鍑芥暟鎿嶄綔鐨勫璞℃槸 <font color="blue">瀛楃涓?/font>錛屽畬鎴?<font color="red">浠? 婧愬瓧絎︿覆 鍒?鐩殑瀛楃涓?鐨?鎷瘋礉</font> 鍔熻兘銆?br /><br /> snprintf 鍑芥暟鎿嶄綔鐨勫璞?<font color="blue">涓嶉檺浜庡瓧絎︿覆</font>錛氳櫧鐒剁洰鐨勫璞℃槸瀛楃涓詫紝浣嗘槸婧愬璞″彲浠ユ槸瀛楃涓層佷篃鍙互鏄換鎰忓熀鏈被鍨嬬殑鏁版嵁銆傝繖涓嚱鏁頒富瑕佺敤鏉ュ疄鐜?<font color="red">錛堝瓧絎︿覆鎴栧熀鏈暟鎹被鍨嬶級(jí)鍚?瀛楃涓?鐨勮漿鎹?/font>鍔熻兘銆傚鏋滄簮瀵硅薄鏄瓧絎︿覆錛屽茍涓旀寚瀹?%s 鏍煎紡絎︼紝涔熷彲瀹炵幇瀛楃涓叉嫹璐濆姛鑳姐?br /><br /> memcpy 鍑芥暟欏懼悕鎬濅箟灝辨槸 <font color="red">鍐呭瓨鎷瘋礉</font>錛屽疄鐜?<font color="red">灝嗕竴涓? 鍐呭瓨鍧?鐨勫唴瀹瑰鍒跺埌鍙︿竴涓?鍐呭瓨鍧?/font> 榪欎竴鍔熻兘銆傚唴瀛樺潡鐢卞叾棣栧湴鍧浠ュ強(qiáng)闀垮害紜畾銆傜▼搴忎腑鍑虹幇鐨勫疄浣撳璞★紝涓嶈鏄粈涔堢被鍨嬶紝鍏舵渶緇堣〃鐜板氨鏄湪鍐呭瓨涓崰鎹竴甯箣鍦幫紙涓涓唴瀛樺尯闂存垨鍧楋級(jí)銆傚洜姝わ紝memcpy 鐨勬搷浣滃璞′笉灞闄愪簬鏌愪竴綾繪暟鎹被鍨嬶紝鎴栬呰鍙?<font color="blue">閫傜敤浜庝換鎰忔暟鎹被鍨?/font>錛屽彧瑕佽兘緇欏嚭瀵硅薄鐨勮搗濮嬪湴鍧鍜屽唴瀛橀暱搴︿俊鎭佸茍涓斿璞″叿鏈夊彲鎿嶄綔鎬у嵆鍙傞壌浜?memcpy 鍑芥暟絳夐暱鎷瘋礉鐨勭壒鐐逛互鍙?qiáng)鏁版嵁绫诲瀷浠h〃鐨勭墿鐞嗘剰涔夊Q宮emcpy 鍑芥暟閫氬父闄愪簬鍚岀綾誨瀷鏁版嵁鎴栧璞′箣闂寸殑鎷瘋礉錛屽叾涓綋鐒朵篃鍖呮嫭瀛楃涓叉嫹璐濅互鍙?qiáng)鍩烘湰鏁版嵁绫诲瀷鐨勬嫰偞濄?br /><br /> 瀵逛簬瀛楃涓叉嫹璐濇潵璇達(dá)紝鐢ㄤ笂榪頒笁涓嚱鏁伴兘鍙互瀹炵幇錛屼絾鏄叾瀹炵幇鐨勬晥鐜囧拰浣跨敤鐨勬柟渚跨▼搴︿笉鍚岋細(xì)<br /><ul><li>strcpy 鏃犵枒鏄渶鍚堥傜殑閫夋嫨錛氭晥鐜囬珮涓旇皟鐢ㄦ柟渚褲?/li><li>snprintf 瑕侀澶栨寚瀹氭牸寮忕騫朵笖榪涜鏍煎紡杞寲錛岄夯鐑?chǔ)涓旀晥鐜囦笉楂樸?/li><li>memcpy 铏界劧楂樻晥錛屼絾鏄渶瑕侀澶栨彁渚涙嫹璐濈殑鍐呭瓨闀垮害榪欎竴鍙傛暟錛屾槗閿欎笖浣跨敤涓嶄究錛涘茍涓斿鏋滈暱搴︽寚瀹氳繃澶х殑璇濓紙鏈浼橀暱搴︽槸婧愬瓧絎︿覆闀垮害 + 1錛夛紝榪樹細(xì)甯︽潵鎬ц兘鐨勪笅闄嶃傚叾瀹?strcpy 鍑芥暟涓鑸槸鍦ㄥ唴閮ㄨ皟鐢?memcpy 鍑芥暟鎴栬呯敤姹囩紪鐩存帴瀹炵幇鐨勶紝浠ヨ揪鍒伴珮鏁堢殑鐩殑銆傚洜姝わ紝浣跨敤 memcpy 鍜?strcpy 鎷瘋礉瀛楃涓插湪鎬ц兘涓婂簲璇ユ病鏈変粈涔堝ぇ鐨勫樊鍒?/li></ul><br /> 瀵逛簬闈炲瓧絎︿覆綾誨瀷鐨勬暟鎹殑澶嶅埗鏉ヨ錛宻trcpy 鍜?snprintf 涓鑸氨鏃犺兘涓哄姏浜?jiǎn)锛屽彲鏄?memcpy 鍗存病鏈変粈涔堝獎(jiǎng)鍝嶃備絾鏄紝瀵逛簬鍩烘湰鏁版嵁綾誨瀷鏉ヨ錛屽敖綆″彲浠ョ敤 memcpy 榪涜鎷瘋礉錛岀敱浜庢湁璧嬪艱繍綆楃鍙互鏂逛究涓旈珮鏁堝湴榪涜鍚岀鎴栧吋瀹圭被鍨嬬殑鏁版嵁涔嬮棿鐨勬嫹璐濓紝鎵浠ヨ繖縐嶆儏鍐典笅 memcpy 鍑犱箮涓嶈浣跨敤銆俶emcpy 鐨勯暱澶勬槸鐢ㄦ潵瀹炵幇錛堥氬父鏄唴閮ㄥ疄鐜板眳澶氾級(jí)瀵圭粨鏋勬垨鑰呮暟緇勭殑鎷瘋礉錛屽叾鐩殑鏄垨鑰呴珮鏁堬紝鎴栬呬嬌鐢ㄦ柟渚匡紝鐢氭垨涓よ呭吋鏈夈?br /><br /> strcpy鍜宮emcpy鍔熻兘涓婁篃鏈変簺宸埆錛?br /> 姣斿:<br /> const char *str1="abc\0def";<br /> char str2[7];<br /><br /> 棣栧厛鐢╯trcpy瀹炵幇錛?br /> strcpy錛坰tr2,str1錛?br /> 寰楀埌緇撴灉錛歴tr2錛?abc";涔熷氨鏄錛宻trcpy鏄互'\0'涓虹粨鏉熸爣蹇楃殑銆?br /><br /> 鍐嶇敤memcpy瀹炵幇錛?br /> memset(str2,7);<br /> memcpy(str2,str1,7);<br /> 寰楀埌緇撴灉錛歴tr2="abc\0def";<br /> 涔熷氨鏄錛宮emcpy鏄鍐呭瓨鍖哄煙鐨勫鍒躲傚綋鐒?dòng)灱屼笉浠呰兘澶熷鍒跺瓧绗︿覆鏁熬l勶紝鑰屼笖鑳藉澶嶅埗鏁村瀷鏁扮粍絳夊叾浠栨暟緇勩?img src ="http://m.tkk7.com/lihao336/aggbug/358442.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/lihao336/" target="_blank">calvin</a> 2011-09-11 14:45 <a href="http://m.tkk7.com/lihao336/archive/2011/09/11/358442.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>[杞琞C/C++ void 鐞嗚Вhttp://m.tkk7.com/lihao336/archive/2011/09/08/358280.htmlcalvincalvinThu, 08 Sep 2011 03:12:00 GMThttp://m.tkk7.com/lihao336/archive/2011/09/08/358280.htmlhttp://m.tkk7.com/lihao336/comments/358280.htmlhttp://m.tkk7.com/lihao336/archive/2011/09/08/358280.html#Feedback0http://m.tkk7.com/lihao336/comments/commentRss/358280.htmlhttp://m.tkk7.com/lihao336/services/trackbacks/358280.html
銆1.姒傝堪
銆銆璁稿鍒濆鑰呭C/C++璇█涓殑void鍙?qiáng)void鎸囬拡綾誨瀷涓嶇敋鐞嗚В錛屽洜姝ゅ湪浣跨敤涓婂嚭鐜頒簡(jiǎn)涓浜涢敊璇傛湰鏂囧皢瀵箆oid鍏抽敭瀛楃殑娣卞埢鍚箟榪涜瑙h錛屽茍璇﹁堪void鍙?qiáng)void鎸囬拡綾誨瀷鐨勪嬌鐢ㄦ柟娉曚笌鎶宸с?br />
銆銆2.void鐨勫惈涔?br />
聽聽聽聽聽聽聽 void鐨勫瓧闈㈡剰鎬濇槸鈥滄棤綾誨瀷鈥濓紝void *鍒欎負(fù)鈥滄棤綾誨瀷鎸囬拡鈥濓紝void *鍙互鎸囧悜浠諱綍綾誨瀷鐨勬暟鎹?br />
銆銆void鍑犱箮鍙湁鈥滄敞閲娾濆拰闄愬埗紼嬪簭鐨勪綔鐢紝鍥犱負(fù)浠庢潵娌℃湁浜轟細(xì)瀹氫箟涓涓獀oid鍙橀噺錛岃鎴戜滑璇曠潃鏉ュ畾涔夛細(xì)

聽聽聽聽聽聽聽 void a;

銆銆榪欒璇彞緙栬瘧鏃朵細(xì)鍑洪敊錛屾彁紺衡渋llegal use of type 'void'鈥濄備笉榪囷紝鍗充嬌void a鐨勭紪璇戜笉浼?xì)鍑洪敊锛屽畠涔熸病鏈変恢M綍瀹為檯鎰忎箟銆?br />
銆銆void鐪熸鍙戞尌鐨勪綔鐢ㄥ湪浜庯細(xì)
銆銆錛?錛?瀵瑰嚱鏁拌繑鍥炵殑闄愬畾錛?br />銆銆錛?錛?瀵瑰嚱鏁板弬鏁扮殑闄愬畾銆?/b>

銆銆鎴戜滑灝嗗湪絎笁鑺傚浠ヤ笂浜岀偣榪涜鍏蜂綋璇存槑銆?br />
銆銆浼楁墍鍛ㄧ煡錛屽鏋滄寚閽坧1鍜宲2鐨勭被鍨嬬浉鍚岋紝閭d箞鎴戜滑鍙互鐩存帴鍦╬1鍜宲2闂翠簰鐩歌祴鍊鹼紱濡傛灉p1鍜宲2鎸囧悜涓嶅悓鐨勬暟鎹被鍨嬶紝鍒欏繀欏諱嬌鐢ㄥ己鍒剁被鍨嬭漿鎹㈣繍綆楃鎶婅祴鍊艱繍綆楃鍙寵竟鐨勬寚閽堢被鍨嬭漿鎹負(fù)宸﹁竟鎸囬拡鐨勭被鍨嬨?br />
銆銆渚嬪錛?br />
float *p1;
int *p2;
p1 = p2;

銆銆鍏朵腑p1 = p2璇彞浼?xì)缂栬瘧鍑洪敊锛屾彁绀衡?=' : cannot convert from 'int *' to 'float *'鈥濓紝蹇呴』鏀逛負(fù)錛?br />
p1 = (float *)p2;

鑰寁oid *鍒欎笉鍚岋紝浠諱綍綾誨瀷鐨勬寚閽堥兘鍙互鐩存帴璧嬪肩粰瀹冿紝鏃犻渶榪涜寮哄埗綾誨瀷杞崲錛?br />
void *p1;
int *p2;
p1 = p2;

浣嗚繖騫朵笉鎰忓懗鐫錛寁oid *涔熷彲浠ユ棤闇寮哄埗綾誨瀷杞崲鍦拌祴緇欏叾瀹冪被鍨嬬殑鎸囬拡銆傚洜涓衡滄棤綾誨瀷鈥濆彲浠ュ寘瀹光滄湁綾誨瀷鈥濓紝鑰屸滄湁綾誨瀷鈥濆垯涓嶈兘鍖呭鈥滄棤綾誨瀷鈥濄傞亾鐞嗗緢綆鍗曪紝鎴戜滑鍙互璇粹滅敺浜哄拰濂充漢閮芥槸浜衡濓紝浣嗕笉鑳借鈥滀漢鏄敺浜衡濇垨鑰呪滀漢鏄コ浜衡濄備笅闈㈢殑璇彞緙栬瘧鍑洪敊錛?br />
void *p1;
int *p2;
p2 = p1;

銆銆鎻愮ず鈥?=' : cannot convert from 'void *' to 'int *'鈥濄?br />
3.void鐨勪嬌鐢?br />
銆銆涓嬮潰緇欏嚭void鍏抽敭瀛楃殑浣跨敤瑙勫垯錛?br />銆銆瑙勫垯涓 濡傛灉鍑芥暟娌℃湁榪斿洖鍊鹼紝閭d箞搴斿0鏄庝負(fù)void綾誨瀷

銆銆鍦–璇█涓紝鍑′笉鍔犺繑鍥炲肩被鍨嬮檺瀹氱殑鍑芥暟錛屽氨浼?xì)琚~栬瘧鍣ㄤ綔涓鴻繑鍥炴暣鍨嬪煎鐞嗐?/b>浣嗘槸璁稿紼嬪簭鍛樺嵈璇互涓哄叾涓簐oid綾誨瀷銆備緥濡傦細(xì)

add ( int a, int b )
{
return a + b;
}
int main(int argc, char* argv[])
{
printf ( "2 + 3 = %d", add ( 2, 3) );
}
銆銆紼嬪簭榪愯鐨勭粨鏋滀負(fù)杈撳嚭錛?br />銆銆2 + 3 = 5
銆銆榪欒鏄庝笉鍔犺繑鍥炲艱鏄庣殑鍑芥暟鐨勭‘涓篿nt鍑芥暟銆?br />
銆銆鏋楅攼鍗氬+銆婇珮璐ㄩ噺C/C++緙栫▼銆嬩腑鎻愬埌錛氣淐++璇█鏈夊緢涓ユ牸鐨勭被鍨嬪畨鍏ㄦ鏌ワ紝涓嶅厑璁鎬笂榪版儏鍐碉紙鎸囧嚱鏁頒笉鍔犵被鍨嬪0鏄庯級(jí)鍙戠敓鈥濄傚彲鏄紪璇戝櫒騫朵笉涓瀹氳繖涔堣瀹氾紝璀鍦╒isual C++6.0涓笂榪癮dd鍑芥暟鐨勭紪璇戞棤閿欎篃鏃犺鍛婁笖榪愯姝g‘錛屾墍浠ヤ笉鑳藉瘎甯屾湜浜庣紪璇戝櫒浼?xì)鍋氫弗鏍肩殑绫诲瀷妫鏌ャ?br />
銆銆鍥犳錛屼負(fù)浜?jiǎn)閬垮厤尕滀贡锛屾垜浠湪缂栧啓C(jī)/C++紼嬪簭鏃訛紝瀵逛簬浠諱綍鍑芥暟閮藉繀欏諱竴涓笉婕忓湴鎸囧畾鍏剁被鍨嬨傚鏋滃嚱鏁版病鏈夎繑鍥炲鹼紝涓瀹氳澹版槑涓簐oid綾誨瀷銆傝繖鏃㈡槸紼嬪簭鑹ソ鍙鎬х殑闇瑕侊紝涔熸槸緙栫▼瑙勮寖鎬х殑瑕佹眰銆傚彟澶栵紝鍔犱笂void綾誨瀷澹版槑鍚庯紝涔熷彲浠ュ彂鎸ヤ唬鐮佺殑鈥滆嚜娉ㄩ噴鈥濅綔鐢ㄣ備唬鐮佺殑鈥滆嚜娉ㄩ噴鈥濆嵆浠g爜鑳借嚜宸辨敞閲婅嚜宸便?br />
鍦–++璇█涓0鏄庝竴涓繖鏍風(fēng)殑鍑芥暟錛?br />
int function(void)
{
return 1;
}

銆銆鍒欒繘琛屼笅闈㈢殑璋冪敤鏄笉鍚堟硶鐨勶細(xì)

function(2);

鍥犱負(fù)鍦–++涓紝鍑芥暟鍙傛暟涓簐oid鐨勬剰鎬濇槸榪欎釜鍑芥暟涓嶆帴鍙椾換浣曞弬鏁般?br />
銆銆鎴戜滑鍦═urbo C 2.0涓紪璇戯細(xì)

#include "stdio.h"
fun()
{
return 1;
}
main()
{
printf("%d",fun(2));
getchar();
}

銆銆緙栬瘧姝g‘涓旇緭鍑?錛岃繖璇存槑錛屽湪C璇█涓紝鍙互緇欐棤鍙傛暟鐨勫嚱鏁頒紶閫佷換鎰忕被鍨嬬殑鍙傛暟錛屼絾鏄湪C++緙栬瘧鍣ㄤ腑緙栬瘧鍚屾牱鐨勪唬鐮佸垯浼?xì)鍑洪敊銆傚湪C++涓紝涓嶈兘鍚戞棤鍙傛暟鐨勫嚱鏁頒紶閫佷換浣曞弬鏁幫紝鍑洪敊鎻愮ず鈥?fun' : function does not take 1 parameters鈥濄?br />
銆銆鎵浠ワ紝鏃犺鍦–榪樻槸C++涓紝鑻ュ嚱鏁頒笉鎺ュ彈浠諱綍鍙傛暟錛屼竴瀹氳鎸囨槑鍙傛暟涓簐oid銆?br />
銆銆瑙勫垯浜?灝忓績(jī)浣跨敤void鎸囬拡綾誨瀷

銆銆鎸夌収ANSI(American National Standards Institute)鏍囧噯錛屼笉鑳藉void鎸囬拡榪涜綆楁硶鎿嶄綔錛屽嵆涓嬪垪鎿嶄綔閮芥槸涓嶅悎娉曠殑錛?br />
void * pvoid;
pvoid++; //ANSI錛氶敊璇?br />pvoid += 1; //ANSI錛氶敊璇?br />//ANSI鏍囧噯涔嬫墍浠ヨ繖鏍瘋瀹氾紝鏄洜涓哄畠鍧氭寔錛氳繘琛岀畻娉曟搷浣滅殑鎸囬拡蹇呴』鏄‘瀹氱煡閬撳叾鎸囧悜鏁版嵁綾誨瀷澶у皬鐨勩?br />//渚嬪錛?br />int *pint;
pint++; //ANSI錛氭紜?br />
銆銆pint++鐨勭粨鏋滄槸浣垮叾澧炲ぇsizeof(int)銆?br />
銆銆浣嗘槸澶у悕榧庨紟鐨凣NU(GNU's Not Unix鐨勭緝鍐?鍒欎笉榪欎箞璁ゅ畾錛屽畠鎸囧畾void *鐨勭畻娉曟搷浣滀笌char *涓鑷淬?br />
鍥犳涓嬪垪璇彞鍦℅NU緙栬瘧鍣ㄤ腑鐨嗘紜細(xì)

pvoid++; //GNU錛氭紜?br />pvoid += 1; //GNU錛氭紜?br />
pvoid++鐨勬墽琛岀粨鏋滄槸鍏跺澶т簡(jiǎn)1銆?br />
銆銆鍦ㄥ疄闄呯殑紼嬪簭璁捐涓紝涓鴻繋鍚圓NSI鏍囧噯錛屽茍鎻愰珮紼嬪簭鐨勫彲縐繪鎬э紝鎴戜滑鍙互榪欐牱緙栧啓瀹炵幇鍚屾牱鍔熻兘鐨勪唬鐮侊細(xì)

void * pvoid;
(char *)pvoid++; //ANSI錛氭紜紱GNU錛氭紜?br />(char *)pvoid += 1; //ANSI錛氶敊璇紱GNU錛氭紜?br />
銆銆GNU鍜孉NSI榪樻湁涓浜涘尯鍒紝鎬諱綋鑰岃█錛孏NU杈傾NSI鏇粹滃紑鏀鋸濓紝鎻愪緵浜?jiǎn)瀵规洿澶氳娉曠殑鏀寔銆備絾鏄垜浠湪鐪熷疄璁捐鏃訛紝榪樻槸搴旇灝藉彲鑳藉湴榪庡悎ANSI鏍囧噯銆?br />
銆銆瑙勫垯鍥?濡傛灉鍑芥暟鐨勫弬鏁板彲浠ユ槸浠繪剰綾誨瀷鎸囬拡錛岄偅涔堝簲澹版槑鍏跺弬鏁頒負(fù)void *

銆銆鍏稿瀷鐨勫鍐呭瓨鎿嶄綔鍑芥暟memcpy鍜宮emset鐨勫嚱鏁板師鍨嬪垎鍒負(fù)錛?br />
void * memcpy(void *dest, const void *src, size_t len);
void * memset ( void * buffer, int c, size_t num );


銆銆榪欐牱錛屼換浣曠被鍨嬬殑鎸囬拡閮藉彲浠ヤ紶鍏emcpy鍜宮emset涓紝榪欎篃鐪熷疄鍦頒綋鐜頒簡(jiǎn)鍐呭瓨鎿嶄綔鍑芥暟鐨勬剰涔夛紝鍥犱負(fù)瀹冩搷浣滅殑瀵硅薄浠呬粎鏄竴鐗囧唴瀛橈紝鑰屼笉璁鴻繖鐗囧唴瀛樻槸浠涔堢被鍨嬨傚鏋渕emcpy鍜宮emset鐨勫弬鏁扮被鍨嬩笉鏄痸oid *錛岃屾槸char *錛岄偅鎵嶅彨鐪熺殑濂囨簡(jiǎn)錛佽繖鏍風(fēng)殑memcpy鍜宮emset鏄庢樉涓嶆槸涓涓滅函綺圭殑錛岃劚紱諱綆綰ц叮鍛崇殑鈥濆嚱鏁幫紒

涓嬮潰鐨勪唬鐮佹墽琛屾紜細(xì)

//紺轟緥錛歮emset鎺ュ彈浠繪剰綾誨瀷鎸囬拡
int intarray[100];
memset ( intarray, 0, 100*sizeof(int) ); //灝唅ntarray娓?

//紺轟緥錛歮emcpy鎺ュ彈浠繪剰綾誨瀷鎸囬拡
int intarray1[100], intarray2[100];

memcpy ( intarray1, intarray2, 100*sizeof(int) ); //灝唅ntarray2鎷瘋礉緇檌ntarray1
銆銆鏈夎叮鐨勬槸錛宮emcpy鍜宮emset鍑芥暟榪斿洖鐨勪篃鏄痸oid *綾誨瀷錛屾爣鍑嗗簱鍑芥暟鐨勭紪鍐欒呮槸澶氫箞鍦板瘜鏈夊闂晩錛?br />
銆銆瑙勫垯浜?void涓嶈兘浠h〃涓涓湡瀹炵殑鍙橀噺

銆銆涓嬮潰浠g爜閮戒紒鍥捐void浠h〃涓涓湡瀹炵殑鍙橀噺錛屽洜姝ら兘鏄敊璇殑浠g爜錛?br />
void a; //閿欒
function(void a); //閿欒

銆銆void浣撶幇浜?jiǎn)涓縐嶆娊璞★紝榪欎釜涓栫晫涓婄殑鍙橀噺閮芥槸鈥滄湁綾誨瀷鈥濈殑錛岃濡備竴涓漢涓嶆槸鐢蜂漢灝辨槸濂充漢錛堣繕鏈変漢濡栵紵錛夈?br />
銆銆void鐨勫嚭鐜板彧鏄負(fù)浜?jiǎn)涓縐嶆娊璞$殑闇瑕侊紝濡傛灉浣犳紜湴鐞嗚В浜?jiǎn)闈㈠悜瀵硅薄涓滄娊璞″熀綾燴濈殑姒傚康錛屼篃寰堝鏄撶悊瑙oid鏁版嵁綾誨瀷銆傛濡備笉鑳界粰鎶借薄鍩虹被瀹氫箟涓涓疄渚嬶紝鎴戜滑涔熶笉鑳藉畾涔変竴涓獀oid錛堣鎴戜滑綾繪瘮鐨勭Оvoid涓衡滄娊璞℃暟鎹被鍨嬧濓級(jí)鍙橀噺銆?br />
4.鎬葷粨
銆銆灝忓皬鐨剉oid钑磋棌鐫寰堜赴瀵岀殑璁捐鍝插錛屼綔涓轟竴鍚嶇▼搴忚璁′漢鍛橈紝瀵歸棶棰樿繘琛屾繁涓涓眰嬈$殑鎬濊冨繀鐒朵嬌鎴戜滑鍙楃泭鍖祬銆?


calvin 2011-09-08 11:12 鍙戣〃璇勮
]]>
main鍑芥暟鍙傛暟鐨勬剰涔?/title><link>http://m.tkk7.com/lihao336/archive/2011/03/02/345526.html</link><dc:creator>calvin</dc:creator><author>calvin</author><pubDate>Wed, 02 Mar 2011 13:33:00 GMT</pubDate><guid>http://m.tkk7.com/lihao336/archive/2011/03/02/345526.html</guid><wfw:comment>http://m.tkk7.com/lihao336/comments/345526.html</wfw:comment><comments>http://m.tkk7.com/lihao336/archive/2011/03/02/345526.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/lihao336/comments/commentRss/345526.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/lihao336/services/trackbacks/345526.html</trackback:ping><description><![CDATA[int   main( int   argc ,  char  *argv[] ,   char  *envp[] )   <br />     main()鍑芥暟涓鑸敤int鎴栬卾oid褰㈢殑銆傛垜姣旇緝鍠滄鐢╥nt鍨嬪畾涔塵ain銆傚洜涓哄湪緇撴潫鐨勬椂鍊欏彲浠ヨ繑鍥炵粰鎿嶄綔緋葷粺涓涓間互琛ㄧず鎵ц鎯呭喌銆?nbsp;  <br /> <br />     int   argc   <br />     榪欎釜涓滀笢鐢ㄦ潵琛ㄧず浣犲湪鍛戒護(hù)琛屼笅杈撳叆鍛戒護(hù)鐨勬椂鍊欙紝涓鍏辨湁澶氬皯涓弬鏁般傛瘮鏂硅浣犵殑紼嬪簭緙栬瘧鍚庯紝鍙墽琛屾枃浠舵槸test.exe   <br />     D:\tc2>test   <br />     榪欎釜鏃跺欙紝argc鐨勫兼槸1   <br />     浣嗘槸   <br />     D:\tc2>test.exe   myarg1   myarg2  鐨勮瘽錛宎rgc鐨勫兼槸3銆備篃灝辨槸鍛戒護(hù)鍚嶅姞涓婁袱涓弬鏁幫紝涓鍏變笁涓弬鏁?nbsp;  <br /> <br />     char   *argv[]   <br />     榪欎釜涓滀笢鐢ㄦ潵鍙栧緱浣犳墍杈撳叆鐨勫弬鏁?nbsp;  <br />     D:\tc2>test   <br />     榪欎釜鏃跺欙紝argc鐨勫兼槸1錛宎rgv[0]鐨勫兼槸   "test"   <br />     D:\tc2>test   myarg1   myarg2   <br />     榪欎釜鏃跺欙紝argc鐨勫兼槸3錛宎rgc[0]鐨勫兼槸"test"錛宎rgc[1]鐨勫兼槸"myarg1"錛宎rgc[2]鐨勫兼槸"myarg2"銆?nbsp;  <br />     榪欎釜涓滀笢涓鑸敤鏉ヤ負(fù)紼嬪簭鎻愪緵闈炲父閲嶈鐨勪俊鎭紝濡傦細(xì)鏁版嵁鏂囦歡鍚嶏紝絳夌瓑銆?nbsp;  <br />     濡傦細(xì)copy   a.c   b.txt   <br />     榪欎釜鏃跺欙紝a.c鍜宐.txt灝辨槸鎵璋撶殑“闈炲父閲嶈鐨勪俊鎭?#8221;銆備笉鎸囧畾榪欎袱涓枃浠訛紝浣犳病娉曡繘琛屾嫹璐濄?nbsp;  <br />     褰撲綘鐨勭▼搴忕敤鍒癮rgc鍜宎rgv榪欎袱涓弬鏁扮殑鏃跺欙紝鍙互綆鍗曞湴閫氳繃鍒ゆ柇argc鐨勫鹼紝鏉ョ湅鐪嬬▼搴忕殑鍙傛暟鏄惁絎﹀悎瑕佹眰   <br /> <br />     char   *envp[]   <br />     榪欎釜涓滀笢鐩稿鏉ヨ鐢ㄥ緱姣旇緝?yōu)畱銆傚畠鏄敤鏉ュ彇寰楃郴緇熺殑鐜鍙橀噺鐨勩?nbsp;  <br />     濡傦細(xì)鍦―OS涓嬶紝鏈変竴涓狿ATH鍙橀噺銆傚綋浣犲湪DOS鎻愮ず絎︿笅杈撳叆涓涓懡浠わ紙褰撶劧錛岃繖涓懡浠や笉鏄痙ir涓綾葷殑鍐呴儴鍛戒護(hù)錛夌殑鏃跺欙紝DOS浼?xì)棣栧厛鍦ㄥ綋鍓嶇洰褰曚笅鎵緲q欎釜鍛戒護(hù)鐨勬墽琛屾枃浠躲傚鏋滄壘涓嶅埌錛屽垯鍒癙ATH瀹氫箟鐨勮礬寰勪笅鍘繪壘錛屾壘鍒板垯鎵ц錛屾壘涓嶅埌榪斿洖Bad   command   or   file   name   <br />     鍦―OS鍛戒護(hù)鎻愮ず絎︿笅閿叆set鍙煡鐪嬬郴緇熺殑鐜鍙橀噺   <br />     鍚屾牱錛屽湪UNIX鎴栬匧INUX涓嬶紝涔熸湁緋葷粺鐜鍙橀噺錛岃屼笖鐢ㄥ緱姣擠OS瑕佸銆傚甯哥敤鐨?PATH,$USER,$HOME絳夌瓑銆?nbsp;  <br />     envp淇濆瓨鎵鏈夌殑鐜鍙橀噺銆傚叾鏍煎紡涓猴紙UNIX涓嬶級(jí)   <br />     PATH=/usr/bin;/local/bin;   <br />     HOME=/home/shuui   <br />     鍗籌細(xì)   <br />     鐜鍙橀噺鍚?鍊?nbsp;  <br />     DOS涓嬪ぇ姒備篃涓鏍楓?nbsp;  <br />     鐜鍙橀噺涓鑸敤鏉ヤ負(fù)紼嬪簭鎻愪緵闄勫姞淇℃伅銆傚錛屼綘鍋氫簡(jiǎn)涓涓樉紺烘枃鏈殑鍐呭鐨勭▼搴忋備綘鎯蟲帶鍒跺叾涓琛屼腑鏄劇ず鐨勫瓧絎︾殑涓暟銆備綘鍙互鑷繁瀹氫箟涓涓幆澧冨彉閲忥紙UNIX涓嬶級(jí)   <br />     %setenv   NUMBER   =   10   <br />     %echo   $NUMBER   <br />     10   <br />     鐒跺悗浣犲彲浠ュ湪紼嬪簭涓鍏ヨ繖涓幆澧冨彉閲忋傜劧鍚庢牴鎹叾鍊煎喅瀹氫竴琛岃緭鍑哄灝戜釜瀛楃銆傝繖鏍鳳紝濡傛灉浣犱笉淇敼鐜鍙橀噺鐨勮瘽錛屼綘姣忔鎵ц榪欎釜紼嬪簭錛屼竴琛屼腑鏄劇ず鐨勫瓧絎︽暟閮芥槸涓嶄竴鏍風(fēng)殑   <br />     涓嬮潰鏄竴涓緥瀛愮▼搴?nbsp;  <br /> <br />     /* argtest.c */   <br /> #include<stdio.h>   <br /> int main(   int   argc   ,   char   *argv[]   ,   char   *envp[]   )   <br /> {   <br />     int   i;   <br /> <br />     printf(   "You   have   inputed   total   %d   argments\n"   ,   argc   );   <br />     for(   i=0   ;   i<argc   ;   i++)   <br />     {   <br />         printf(   "arg%d   :   %s\n"   ,   i   ,   argv[i]   );   <br />     }   <br /> <br />     printf(   "The   follow   is   envp   :\n"   );   <br />     for(   i=0   ;   *envp[i]!='\0'   ;   i++   )   <br />     {   <br />         printf(   "%s\n"   ,   envp[i]   );   <br />     }   <br />     return   0;   <br /> }   <br /> <br /> <br /> D:\>argtest   this   is   a   test   programe   of   main()'s   argments   <br /> You   have   inputed   total   9   argments   <br /> arg0   :   D:\TC\NONAME.EXE   <br /> arg1   :   this   <br /> arg2   :   is   <br /> arg3   :   a   <br /> arg4   :   test   <br /> arg5   :   programe   <br /> arg6   :   of   <br /> arg7   :   main()'s   <br /> arg8   :   argments   <br /> The   follow   is   envp   :   <br /> TMP=C:\WINDOWS\TEMP   <br /> TEMP=C:\WINDOWS\TEMP   <br /> PROMPT=$p$g   <br /> winbootdir=C:\WINDOWS   <br /> PATH=C:\WINDOWS;C:\WINDOWS\COMMAND   <br /> COMSPEC=C:\WINDOWS\COMMAND.COM   <br /> SBPCI=C:\SBPCI   <br /> windir=C:\WINDOWS   <br /> BLASTER=A220   I7   D1   H7   P330   T6   <br /> CMDLINE=noname   this   is   a   test   programe   of   main()'s   argments     <br /> -----------------------------------------------------------------------------------------<br /> 鍛戒護(hù)琛屽弬鏁板晩 argc   鏄弬鏁扮殑涓暟錛宎rgv[]鏄弬鏁幫紝argv[0]鏄枃浠跺悕錛宎rgv[1]鏄涓涓弬鏁?..   <br /> 濡備綘寰梕xe鏂囦歡鍚嶆槸:myprog.exe錛岄偅涔?nbsp;  <br /> myprog   12   22   32   <br /> 鍒檃rgv[0]="myprog"錛宎rgv[1]="12"錛宎rgv[2]="22"...   <br /> <br /> <br /> <img src ="http://m.tkk7.com/lihao336/aggbug/345526.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/lihao336/" target="_blank">calvin</a> 2011-03-02 21:33 <a href="http://m.tkk7.com/lihao336/archive/2011/03/02/345526.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss> <footer> <div class="friendship-link"> <p>感谢您访问我们的网站,您可能还对以下资源感兴趣:</p> <a href="http://m.tkk7.com/" title="亚洲av成人片在线观看">亚洲av成人片在线观看</a> <div class="friend-links"> </div> </div> </footer> 主站蜘蛛池模板: <a href="http://www-ttyx.com" target="_blank">120秒男女动态视频免费</a>| <a href="http://7766qq.com" target="_blank">亚洲?v女人的天堂在线观看</a>| <a href="http://lemonbt.com" target="_blank">亚洲伊人久久大香线蕉影院</a>| <a href="http://shbailongma.com" target="_blank">成人性生免费视频</a>| <a href="http://tha2008.com" target="_blank">日本黄页网址在线看免费不卡</a>| <a href="http://rj150.com" target="_blank">国产亚洲人成网站在线观看不卡</a>| <a href="http://www961dd.com" target="_blank">无码精品A∨在线观看免费</a>| <a href="http://xdxdl.com" target="_blank">国产精品亚洲а∨无码播放麻豆 </a>| <a href="http://331927.com" target="_blank">免费无码又爽又刺激网站直播 </a>| <a href="http://pufenghotel.com" target="_blank">国产亚洲日韩在线三区</a>| <a href="http://kencery.com" target="_blank">7m凹凸精品分类大全免费</a>| <a href="http://32-k.com" target="_blank">亚洲AV无码一区二区一二区</a>| <a href="http://liulaogendawutai.com" target="_blank">精品亚洲视频在线观看</a>| <a href="http://aiqingdao999.com" target="_blank">1000部夫妻午夜免费</a>| <a href="http://89895cc.com" target="_blank">污网站在线免费观看</a>| <a href="http://bisi666.com" target="_blank">亚洲欧洲国产综合</a>| <a href="http://5gz0z.com" target="_blank">狠狠综合久久综合88亚洲</a>| <a href="http://yuntao360.com" target="_blank">国产大片线上免费观看</a>| <a href="http://wwwav888.com" target="_blank">久久久久久久久久久免费精品</a>| <a href="http://avxyz.com" target="_blank">亚洲天堂电影在线观看</a>| <a href="http://wowo123.com" target="_blank">亚洲日本一区二区三区在线不卡</a>| <a href="http://zblinghang.com" target="_blank">h视频在线免费看</a>| <a href="http://jimeng-99.com" target="_blank">www.av在线免费观看</a>| <a href="http://zqsplc.com" target="_blank">亚洲avav天堂av在线网爱情</a>| <a href="http://langtuojidian.com" target="_blank">国产精品亚洲综合一区</a>| <a href="http://yisaoma.com" target="_blank">成全高清视频免费观看</a>| <a href="http://0755host.com" target="_blank">久久久久久国产精品免费无码</a>| <a href="http://www96pg.com" target="_blank">成人a毛片视频免费看</a>| <a href="http://778002.com" target="_blank">亚洲avav天堂av在线网爱情</a>| <a href="http://my77789.com" target="_blank">亚洲AV无码一区二区二三区入口</a>| <a href="http://youyou8tv.com" target="_blank">永久免费毛片手机版在线看</a>| <a href="http://b2bautoparts.com" target="_blank">99视频精品全部免费观看</a>| <a href="http://hyhtzh.com" target="_blank">sihu国产精品永久免费</a>| <a href="http://zhaofeiz.com" target="_blank">亚洲精品无码久久久久YW</a>| <a href="http://wua72.com" target="_blank">亚洲美女视频一区二区三区</a>| <a href="http://tsxyhq.com" target="_blank">国产偷国产偷亚洲清高动态图</a>| <a href="http://xjyzz.com" target="_blank">日韩视频免费在线</a>| <a href="http://cc45987.com" target="_blank">在线观看H网址免费入口</a>| <a href="http://1777000.com" target="_blank">久久久久国产精品免费免费不卡</a>| <a href="http://69ct.com" target="_blank">一个人看的免费视频www在线高清动漫 </a>| <a href="http://jte-sh.com" target="_blank">久久亚洲国产成人精品性色</a>| <script> (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if (curProtocol === 'https') { bp.src = 'https://zz.bdstatic.com/linksubmit/push.js'; } else { bp.src = 'http://push.zhanzhang.baidu.com/push.js'; } var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })(); </script> </body>