锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲免费一区二区,欧美激情麻豆,欧美亚男人的天堂 http://www.shnenglu.com/willcao/闈炴竟娉婃棤浠ユ槑蹇?闈炲畞闈欐棤浠ヨ嚧榪?/description>zh-cn Mon, 29 Sep 2025 15:36:47 GMT Mon, 29 Sep 2025 15:36:47 GMT 60 Dynamic Programming 2: Numbers http://www.shnenglu.com/willcao/archive/2012/05/25/176124.htmlMichaelCao MichaelCao Fri, 25 May 2012 04:06:00 GMT http://www.shnenglu.com/willcao/archive/2012/05/25/176124.html
渚嬪錛歔1, -3, 2, -4 , 5 , 6, -2, 6, 7] 鏈澶х殑鍜屽氨鏄?22 = 5 + 6 - 2 + 6 +7.
瑙f硶濡備笅錛?br />
int subMax(int [] a)
{
int best = 0;
int sum = 0;
for (int i = 0; i < a.length; i++)
{
sum = sum + a[i];
if (sum < 0 )
sum = 0;
else if (sum > best)
best = sum;
}
return best;
}
鎯蟲硶灝辨槸涓鐩村姞鎺ヤ笅鏉ョ殑鏁幫紝濡傛灉灝忎簬闆跺氨鍙樹負0錛屽ぇ浜庢渶澶х殑鏁板氨鏇存柊銆傚叾涓竴鐐瑰氨鏄紝濡傛灉閬囧埌璐熸暟錛?
濡傛灉鍜屼笉灝忎簬闆跺氨涓嶇敤浣縮um涓洪浂銆傚鏋滄暟緇勫叏閮ㄤ負璐熸暟錛屼笂闈㈢殑浠g爜鏈夌偣闂錛屼絾涓嶆敼浜嗐傚鏋滄兂鐭ラ亾
榪欎釜鏈澶х殑鍜岀殑搴忓垪鏄粈涔堬紝鍙紼嶅井鏀瑰彉灝卞彲浠ヤ簡錛屼笉璇翠簡銆?br />
2.
Ugly Number: 鎵懼嚭絎琻涓兘琚?錛?錛?鏁撮櫎鐨勬暟
渚嬪錛?, 3, 4, 5, 6, 9,10, 12, 15, 20, 25 ... 絎?涓槸4錛?絎?涓槸5錛岀5涓槸6 ... 絎?00鏄紵
鎯蟲硶錛氶鍏堟槸浠?1寮濮嬶紝2錛?錛?鍒嗗埆涔?錛屾渶灝忕殑鏄?錛屾帴涓嬫潵灝辨槸2錛?鐨勪綅緗繘1錛?鍜?鐨勪綅緗笉鍙?
鍐嶆潵涓嬈★紝鏈灝忕殑鏄?錛?鐨勪綅緗繘1錛?鍜?浣嶇疆榪?錛屽啀鏉ヤ竴嬈★紝鏈灝忕殑鏄?錛?鍜?鐨勪綅緗笉鍙樸傘傘?br />
int uglyNum( int n)
{
int a = new int [n + 1 ]
a[ 0 ] = 1 ;
int i2 = 0 , i3 = 0 , i5 = 0 ;
int n2 = 0 ; n3 = 0 ; n5 = 0 ;
int m = 0 ;
for ( int i = 0 ; i <= n; i ++ )
{
n2 = a[i2] * 2 ;
n3 = a[i3] * 3 ;
n5 = a[i5] * 5 ;
m = min(n2, n3, n5);
if (m == n2)
{
a[i] = m;
i2 ++ ;
}
// similar for i3 and i5
}
return a[n];
}
3. 鏈鍚庝竴涓棶棰橈細緇?i, j 涓や釜鏁幫紝鐒跺悗鎵撳嵃鍑?2^i 錛?^j 鐨勫簭鍒?br />
渚嬪錛?i = 3 j =4 灝辨墦鍗板嚭錛?br />
2^0 * 5 ^0 = 1
2^1 * 5^0 = 2
2^2 * 5 ^0 = 4
2^0 * 5^1 = 5
2^3 * 5^0 = 8
2^1 * 5^1 = 10
...
瑙f硶錛氬拰涓婇潰涓涓В娉曞緢鐩鎬技錛屼笉榪囨敞鎰忚澶勭悊鐩哥瓑鐨勬儏鍐碉紝姣斿2 * 2^1 * 5 ^1 = 20 2^2 * 5^0 ^5 = 20,
浠g爜灝變笉鍐欎簡銆?img src ="http://www.shnenglu.com/willcao/aggbug/176124.html" width = "1" height = "1" /> ]]> Dynamic Programming 1: Strings http://www.shnenglu.com/willcao/archive/2012/05/23/175937.htmlMichaelCao MichaelCao Wed, 23 May 2012 14:03:00 GMT http://www.shnenglu.com/willcao/archive/2012/05/23/175937.html 瀹冨拰鍒嗚屾不涔嬫湁鐐圭被浼鹼紝浣嗘湁鎵涓嶅悓銆侱P鎵鍒嗚В鍑烘潵鐨勫皬闂浼氱浉浜掍緷璧栵紝鍥犳灝變笉鐭ラ亾浠庡摢閲屽垎銆傝屽垎鑰屾不涔嬬殑灝忛棶棰樹笉鐩鎬簰渚濊禆銆傚厛鐪?br />涓皬紼嬪簭鍚э紝鐢熸垚絎琻涓狥ibnacci鏁幫紝鍙兘鏈変漢浼氳繖涔堝啓int fib ( int n ) { if ( n == 0 ) return 1; if ( n == 1 ) return 1; return fib ( n - 1 ) + fib ( n - 2 ); }
浣嗚繖涓嚱鏁版槸2^n鐨勯掑綊錛屾墍浠ュ緢蹇爢鏍堝氨浼氳鐢ㄥ畬鐨勩傚彟澶栧鏋滄濊冧竴涓嬶紝浣犱細鍙戠幇 fib( n - 1 ) 涔熷凡緇忚鐢ㄥ埌fib ( n - 2 ), 鍙槸鍦?br />綆梖ib ( n ) 鐨勬椂鍊欙紝榪欎釜鍊煎張瑕佺畻涓閬嶏紝閭d負浠涔堜笉鎶婅繖涓煎瓨涓嬫潵鍛紵 濂? 鎴戜滑灝辨崲涓狣P鐨勬柟寮忥細int fib ( int n ) { if ( n == 0 || n == 1 ) return 1; int [] f = new int [ n ]; f[ 0 ] = 1; f[ 1 ] = 1; for ( int i = 2; i < n; i++) { f[ i ] = f[ i-1 ] + f[ i-2 ]; } return f[ n-1 ]; }
鍙兘榪欎釜姣旇緝瀹規槗浜嗐傚ぇ瀹墮兘鏄庣櫧錛屽氨鏄厛鎶婁互鍓嶇殑鍊肩粰綆楀ソ錛岀劧鍚庡悗闈㈢殑璁$畻灝卞彲浠ュ埄鐢ㄥ墠闈㈢殑鍊箋傚棷錛岄偅紼嶅井鎹釜闅劇偣鐨勫惂銆傜粰涓涓猲*n鐨?,1 matrix錛岀劧鍚庢壘鍒版渶澶х殑鍏ㄦ槸1鐨剆ubmatrix鐨勫ぇ灝忋傛瘮濡傦細 00011 01111 11110 01110 榪欎釜鏈澶х殑閭d釜鍏ㄦ槸1鐨剆ubmatrix鐨勫ぇ灝忓氨鏄?.鐪嬭搗鏉ユ尯闅撅紝鍏跺疄铔鏄撶殑銆?br />鎴戜滑鍏堢敤鏈騫沖父鐨勬濊礬鏉ヨВ涓涓嬪惂銆?br />鍏堝垵濮嬪寲鍙﹀涓涓悓鏍峰ぇ灝忕殑n*n鐨刴atrix 絎竴琛屽拰絎竴鍒楀緢瀹規槗錛屽拰鍘熷厛涓鏍風殑鍊?br />00011 0 0 1 0 鎺ヤ笅鏉ワ紝綆楃浜岃錛屽拰鍏朵粬鐨勮銆傝嚜宸卞姩鎵嬶紝浣犲氨鐭ラ亾鍏跺疄灝辨槸s[i][j] = min(s[i][j - 1 ],s[i - 1 ][j],s[i - 1 ][j - 1 ]) + 1 鎴戜滑欏轟究榪樺彲浠ュ姞涓婁竴涓猰ax,璁板綍鏈澶х殑鍊箋?br />榪欐牱榪欎釜灝辨悶瀹氫簡銆侱P浠嬬粛瀹屾瘯銆傛帴涓嬫潵寮濮嬪叧浜嶴tring鐨凞P 1.鎵懼埌涓や釜瀛楃涓茬殑鏈澶х浉鍚屽瓧涓茬殑闀垮害 渚嬪錛歛baabb aabbaa 鏈澶х殑鐩稿悓瀛椾覆aabb闀垮害灝辨槸4. 瑙f硶錛氱粰涓や釜涓?p,q 鎴戜滑鏈?br />c(i,j) = 0 if p[i] != q[j] c(i,j) = c(i-1,j-1) + 1 if p[i] = q[j]. 浠g爜鍜屼笂闈ubmatrix寰堢浉浼箋傚厛鍒濆鍖栬竟緙橈紝鐒跺悗綆楀嚭鍏朵粬鐨勫?br />2.鎵懼埌涓や釜瀛楃涓茬殑鏈澶ubsequence鐨勯暱搴?br />渚嬪錛歛cbbab abbca 鏈澶х殑subsequence is abba 闀垮害鏄?. 瑙f硶錛氱粰涓や釜涓?p,q 鎴戜滑鏈?br />c(i,j) = max(c(i-1,j),c(i,j-1)) if p[i] != q[j] c(i,j) = c(i-1,j-1) + 1 if p[i] = q[j] 3.鎵懼埌涓涓瓧絎︿覆鏈澶х殑Palindrom 渚嬪: abcdedcbdsa 鏈澶х殑Palindrom灝辨槸bcdedcb 闀垮害鏄? 瑙f硶錛氱粰涓涓覆p c(i,j) = max(c(i+1,j),c(i,j-1)) if p[i] != q[j] c(i,j) = c(i+1,j-1) + 2 if p[i] = q[j]
]]> Use the rsync to back up all files http://www.shnenglu.com/willcao/archive/2010/11/15/133651.htmlMichaelCao MichaelCao Mon, 15 Nov 2010 06:22:00 GMT http://www.shnenglu.com/willcao/archive/2010/11/15/133651.html http://www.shnenglu.com/willcao/comments/133651.html http://www.shnenglu.com/willcao/archive/2010/11/15/133651.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/133651.html http://www.shnenglu.com/willcao/services/trackbacks/133651.html rsync --progress --avze ssh --delete srcDir/ remoteName@remoteMachine:remoteDir/ -a quick way to specify the recursion and preserve everything. -v verbose -z compress And then change ssh with no password: Create the private keys for local machine:
ssh-keygen -t dsa
Copy the local keys to remote machine:
ssh-copy-id -i ~/.ssh/id_dsa.pub remoteuser@remotebox
Do not set the password. After that, add an alias into your .bashrc alias bp='. ~/backup.sh' So you can run bp directly to backup all things. Over ~~~ ]]>濡備綍浣跨敤ramdisk in linux http://www.shnenglu.com/willcao/archive/2009/11/05/100205.htmlMichaelCao MichaelCao Thu, 05 Nov 2009 05:26:00 GMT http://www.shnenglu.com/willcao/archive/2009/11/05/100205.html http://www.shnenglu.com/willcao/comments/100205.html http://www.shnenglu.com/willcao/archive/2009/11/05/100205.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/100205.html http://www.shnenglu.com/willcao/services/trackbacks/100205.html 闃呰鍏ㄦ枃 ]]> 濡備綍澶勭悊hadoop 鏃犳硶鍚姩 http://www.shnenglu.com/willcao/archive/2009/11/03/100069.htmlMichaelCao MichaelCao Tue, 03 Nov 2009 11:38:00 GMT http://www.shnenglu.com/willcao/archive/2009/11/03/100069.html http://www.shnenglu.com/willcao/comments/100069.html http://www.shnenglu.com/willcao/archive/2009/11/03/100069.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/100069.html http://www.shnenglu.com/willcao/services/trackbacks/100069.html http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_%28Single-Node_Cluster%29 寰堝ソ鐨勪竴綃囨枃绔狅紝灝ゅ叾鏄噷闈㈢殑紱佺敤ipv6 ]]> 濡備綍鍦╱buntu涓嬌鐢╯sh http://www.shnenglu.com/willcao/archive/2009/10/20/99003.htmlMichaelCao MichaelCao Tue, 20 Oct 2009 02:07:00 GMT http://www.shnenglu.com/willcao/archive/2009/10/20/99003.html http://www.shnenglu.com/willcao/comments/99003.html http://www.shnenglu.com/willcao/archive/2009/10/20/99003.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/99003.html http://www.shnenglu.com/willcao/services/trackbacks/99003.html 闃呰鍏ㄦ枃 ]]> Signal And Await In java http://www.shnenglu.com/willcao/archive/2009/10/07/98020.htmlMichaelCao MichaelCao Wed, 07 Oct 2009 06:31:00 GMT http://www.shnenglu.com/willcao/archive/2009/10/07/98020.html http://www.shnenglu.com/willcao/comments/98020.html http://www.shnenglu.com/willcao/archive/2009/10/07/98020.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/98020.html http://www.shnenglu.com/willcao/services/trackbacks/98020.html 闃呰鍏ㄦ枃 ]]> 濡備綍鍦╡clipse涓緗甹ava heap size http://www.shnenglu.com/willcao/archive/2009/10/06/97924.htmlMichaelCao MichaelCao Tue, 06 Oct 2009 02:31:00 GMT http://www.shnenglu.com/willcao/archive/2009/10/06/97924.html http://www.shnenglu.com/willcao/comments/97924.html http://www.shnenglu.com/willcao/archive/2009/10/06/97924.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/97924.html http://www.shnenglu.com/willcao/services/trackbacks/97924.html 闃呰鍏ㄦ枃 ]]> 濡備綍鍦ㄦ湰鏈篹clipse涓嬭皟璇旽adoop. http://www.shnenglu.com/willcao/archive/2009/09/29/97577.htmlMichaelCao MichaelCao Tue, 29 Sep 2009 13:21:00 GMT http://www.shnenglu.com/willcao/archive/2009/09/29/97577.html http://www.shnenglu.com/willcao/comments/97577.html http://www.shnenglu.com/willcao/archive/2009/09/29/97577.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/97577.html http://www.shnenglu.com/willcao/services/trackbacks/97577.html 闃呰鍏ㄦ枃 ]]> Hadoop 綰犻敊涓 http://www.shnenglu.com/willcao/archive/2009/09/28/97454.htmlMichaelCao MichaelCao Mon, 28 Sep 2009 05:32:00 GMT http://www.shnenglu.com/willcao/archive/2009/09/28/97454.html http://www.shnenglu.com/willcao/comments/97454.html http://www.shnenglu.com/willcao/archive/2009/09/28/97454.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/97454.html http://www.shnenglu.com/willcao/services/trackbacks/97454.html 1.鍚勪釜鑺傜偣涓婄殑鐗堟湰瑕佺浉鍚屻傞渶瑕佹敞鎰忕殑鏄紝緙栬瘧鍚庯紝紼嬪簭榪愯灝變細浠巄uild鏂囦歡澶歸噷鐨刢lass鏂囦歡榪愯錛屾墍浠ュ嵆浣夸綘鎶妀ar鍖卌p鍒版牴鐩綍搴曚笅錛屼粛鐒舵病鐢ㄣ傚垹闄uild鐩綍閲岄潰鐨刯ar鍖咃紝榪樻槸娌$敤銆傚姙娉? ant clean 2.鍦ㄤ嬌鐢ㄤ竴涓柊鐗堟湰浠ュ悗錛屽彲鑳戒細鍑虹幇mapreduce鑳藉惎鍔紝浣嗘槸dfs鏃犳硶鍚姩鐨勬儏鍐點傚嵆浣夸綘format namenode榪樻槸涓嶈銆傝繖涓鎴戦儊闂蜂簡濂戒箙銆俶apreduce 閮藉彲浠ュ惎鍔紝浣嗗氨鏄痙fs鏃犳硶鍚姩銆俤atanode灝辨槸鍚姩涓嶄簡銆傛兂浜嗗ソ涔咃紝鎬葷畻鎯蟲槑鐧戒簡銆傚洜涓篸atanode閲岄潰鏈夋暟鎹紝鍙槸namenode閲岄潰鍗存牸寮忓寲浜嗐傚姙娉曪細鍒犻櫎鎵鏈塪atanode涓殑鏁版嵁銆?br> 浣跨敤ssh 榪滅▼鎵ц鍛戒護 ssh gp09@***.comp.nus.edu.sg 'mkdir hadoop' 涓嶈繃ssh鏈変竴涓瘮杈冪儲鐨勫湴鏂癸紝灝辨槸涓嶈兘鐢╟d鍛戒護銆傛墍浠ュ湪浣跨敤鐨勬椂鍊欒灝忓績銆?br> 鍦╨inux鎴栬卽nix涓畨瑁卆nt 緙栬緫.bashrc 鏂囦歡 娣誨姞錛?br>export ANT_HOME=~/files/.... export JAVA_HOME=/usr/lib/jvm/java-6-sun/jre/bin/java export PATH=$(PATH):$(ANT_HOME)/bin 鏈熶腑$琛ㄧず鎻愬彇鍙橀噺錛?琛ㄧず鍦ㄥ悗闈㈡坊鍔犮?br> ]]> 鍏充簬鑷棆閿佸拰淇″彿閲忕殑綰犳 http://www.shnenglu.com/willcao/archive/2008/12/10/69103.htmlMichaelCao MichaelCao Wed, 10 Dec 2008 12:49:00 GMT http://www.shnenglu.com/willcao/archive/2008/12/10/69103.html http://www.shnenglu.com/willcao/comments/69103.html http://www.shnenglu.com/willcao/archive/2008/12/10/69103.html#Feedback 2 http://www.shnenglu.com/willcao/comments/commentRss/69103.html http://www.shnenglu.com/willcao/services/trackbacks/69103.html 搴熻瘽涓嶅璇翠簡.棣栧厛浠庤嚜鏃嬮攣鐨勬潵婧愭潵鐪嬪惂.璇村埌榪欎釜灝辮璇碨MP,linux 鍦?.2鐨勫唴鏍鎬箣鍚庡氨鍔犲叆浜哠MP鐨勬敮鎸?涓鐩村埌2.6瓚婃潵瓚婂ソ.鏈塖MP灝辨湁澶氫釜cpu鐨勯槦鍒?姣忎竴涓猚pu閮芥湁涓涓嚜宸辯殑璋冨害闃熷垪.榪欐牱鍦ㄦ湁浜涙椂鍊欏氨闇瑕佸鉤琛¤繖浜涢槦鍒?榪欎釜鏃跺欏氨瑕佺敤鍒伴攣,璁╁叾浠朿pu浠涔堜篃涓嶅仛.璁╀竴涓猚pu鏉ユ洿鏂拌繖浜涢槦鍒?榪欎釜鏃跺欒偗瀹氭槸涓嶈兘鐢ㄤ俊鍙烽噺鐨??).榪欐牱灝卞嚭鐜頒簡鑷棆閿?褰撶劧鑷棆閿佺殑鐢ㄩ斾笉姝㈣繖閲?姣斿璇村湪涓柇涓?榪涘叆涓寸晫鍖?淇″彿閲忎篃鏄笉鑳界敤鐨??).榪欎釜鏃跺欏氨瑕佺敤鑷棆閿?鍏朵粬鏂歸潰鐨勮瘽,鎴戝啀鍥炲幓鐪嬬湅.榪欐牱鐨勮瘽搴旇灝卞緢娓呮浜?淇″彿閲忓彧鏄湪榪涚▼涓嬌鐢ㄧ殑.涓鑸潵璇?搴旂敤綰х▼搴?浣犳牴鏈笉鐢ㄨ冭檻鑷棆閿?娌℃湁SMP,涔熶笉鐢ㄨ冭檻浜?鍥犱負浠g爜緙栬瘧浠ュ悗鍙槸紱佹浜嗗唴鏍告姠鍗?榪欎篃灝辨槸璇?榪欐浠g爜涓嶄細琚姠鍗?sleep浠涔堢殑鏍規湰娌$敤.濡傛灉鏄紑鍙戦┍鍔ㄦ柟闈㈢殑璇?榪欎釜鍦ㄥ繀瑕佺殑鏃跺欒繕鏄簲璇ヨ冭檻涓涓?浠涔堟槸蹇呰鐨勬椂鍊欏憿?灝辨槸涓婇潰鎴戣鐨?榪涘叆涓柇涓寸晫鍖轟笖鏈夊涓猚pu. ]]> 鍑芥暟鎸囬拡鐨勫己鍒剁被鍨嬭漿鎹?/title> http://www.shnenglu.com/willcao/archive/2008/09/30/FunctionTest.htmlMichaelCao MichaelCao Tue, 30 Sep 2008 03:26:00 GMT http://www.shnenglu.com/willcao/archive/2008/09/30/FunctionTest.html http://www.shnenglu.com/willcao/comments/63074.html http://www.shnenglu.com/willcao/archive/2008/09/30/FunctionTest.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/63074.html http://www.shnenglu.com/willcao/services/trackbacks/63074.html 1 #include < iostream > 2 using namespace std ; 3 4 typedef void ( * pfn) ( void ); 5 union msg 6 { 7 pfn first ; 8 int ( * ifn)( int a , int b ); 9 void ( * vfn)( int , int ); 10 }; 11 int OnInt( int a , int b ) 12 { 13 cout<< a << " " << b << endl; 14 return a ; 15 }16 void OnVoid( int a , int b ) 17 { 18 cout<< a << " " << b << endl; 19 }20 int main() 21 { 22 pfn p= (pfn)( int ( * )( int , int ))OnInt; 23 msg m;24 m.first= p; 25 cout<< (m.ifn)( 5 , 6 ) << endl; 26 27 p= (pfn)( void ( * )( int , int ))OnVoid; 28 m.first= p; 29 m.vfn(10 , 15 ); 30 return 0 ; 31 }
鐪嬩簡榪欐浠g爜浼氳浜烘兂鍒頒粈涔堝憿?鎯沖埌鐨勫簲璇ユ槸MFC涓偅浜涙秷鎭嚱鏁板惂.涓嶅悓鐨勬秷鎭?鍙傛暟涓嶄竴鏍?榪斿洖鍊間篃涓嶄竴鏍?鑰屽湪瀹氫箟鐨勬椂鍊欏彧鏄竴涓寚閽?鍙槸鍦ㄨ皟鐢ㄧ殑鏃跺欏嵈鏈夊悇縐嶅悇鏍風殑鏂瑰紡.鍙﹀榪欐浠g爜鏈鏈夋剰鎬濈殑灝辨槸鎵撶牬甯歌,灝辯敤浜唘nion鍚屾椂鍙湁涓涓彉閲忓湪璧蜂綔鐢?騫蟲椂涔︿笂鎬繪槸璇村叾浠栧彉閲忛兘涓嶈兘鐢?浠婂ぉ灝辯敤緇欎綘鐪嬬湅,鐢ㄧ殑榪樺緢鐗?..
]]> 鍏充簬瀛愯繘紼嬪拰鐖惰繘紼?-fork鍑芥暟 http://www.shnenglu.com/willcao/archive/2008/07/06/55490.htmlMichaelCao MichaelCao Sun, 06 Jul 2008 15:40:00 GMT http://www.shnenglu.com/willcao/archive/2008/07/06/55490.html http://www.shnenglu.com/willcao/comments/55490.html http://www.shnenglu.com/willcao/archive/2008/07/06/55490.html#Feedback 8 http://www.shnenglu.com/willcao/comments/commentRss/55490.html http://www.shnenglu.com/willcao/services/trackbacks/55490.html 璐寸偣浠g爜紼嶇◢瑙i噴涓涓?
#include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> int main(void) { pid_t pid=fork(); if(pid==0) { int j ; for(j=0;j<10;j++) { printf("child: %d\n",j); sleep(1); } } else if (pid>0) { int i; for(i=0;i<10;i++) { printf("parent: %d\n",i); sleep(1); } } else { fprintf(stderr,"can't fork ,error %d\n",errno); exit(1); } printf("This is the end !"); }
榪愯浜嗚繖孌典唬鐮?鎴戞兂搴旇鎵鏈変漢閮藉簲璇ヤ簡瑙ork浜嗗惂.榪愯鐨勬椂鍊欏彲浠ユ煡鐪嬭繘紼?ps -aux),浼氬彂鐜版湁涓や釜涓鏍風殑榪涚▼,榪愯緇撴潫鍚庢渶鍚庝竴鍙rintf浼氳繍琛屼袱嬈?鍥犱負姣忎釜榪涚▼閮戒細榪愯涓嬈?涓棿鐨勪氦鏇垮氨鏄繘紼嬬殑璋冨害浜?鎴戜篃鏄垰鍒氭槑鐧?榪樻湁寰堝涓滆タ瑕佹繁鍒葷悊瑙?鎬葷畻鏈夌偣鐪夌洰浜?寰堢埥. ]]> 鐢ㄤ唬鐮佹潵鎬濊冭嚜鏃嬮攣鍜屼俊鍙烽噺 http://www.shnenglu.com/willcao/archive/2008/04/30/48527.htmlMichaelCao MichaelCao Wed, 30 Apr 2008 08:45:00 GMT http://www.shnenglu.com/willcao/archive/2008/04/30/48527.html http://www.shnenglu.com/willcao/comments/48527.html http://www.shnenglu.com/willcao/archive/2008/04/30/48527.html#Feedback 4 http://www.shnenglu.com/willcao/comments/commentRss/48527.html http://www.shnenglu.com/willcao/services/trackbacks/48527.html 鑷繁瀛︾潃鍒漢灝忓皬鐨勫姩浜嗕笅鎵? 鍏堣創淇″彿閲忕殑浠g爜.
#include<pthread.h> #include<stdio.h> #include<sys/time.h> #define MAX 10 pthread_t thread[2]; pthread_mutex_t mut; int number=0,i; void * thread1() { printf("thread1: I'm thread 1 \n"); for(i =0;i<MAX ;i++) { printf("thread 1: number=%d \n",number); pthread_mutex_lock(&mut); number++; pthread_mutex_unlock(&mut); sleep(2); } printf("thread1: 涓誨嚱鏁板湪絳夋垜瀹屾垚浠誨姟鍚楋紵\n"); pthread_exit(NULL); } void * thread2() { printf("thread2: I'm thread 2 \n"); for(i =0; i<MAX;i++) { printf("thread2 : number=%d\n",number); pthread_mutex_lock(&mut); number++; pthread_mutex_unlock(&mut); sleep(3); } printf("thread2 : 涓誨嚱鏁板湪絳夋垜瀹屾垚浠誨姟涔堬紵\n"); pthread_exit(NULL); } void thread_create(void) { /*鍒涘緩綰跨▼*/ pthread_create(&thread[0],NULL,thread1,NULL); printf("綰跨▼1琚垱寤猴紒\n"); pthread_create(&thread[1],NULL,thread2,NULL); printf("綰跨▼2琚垱寤猴紒\n"); } void thread_wait(void) { /*絳夊緟綰跨▼緇撴潫*/ pthread_join(thread[0],NULL); printf("綰跨▼1宸茬粡緇撴潫錛乗n"); pthread_join(thread[1],NULL); printf("綰跨▼2宸茬粡緇撴潫!\n"); } int main() { /*鐢ㄩ粯璁ゅ睘鎬у垵濮嬪寲浜掓枼閿?/ pthread_mutex_init(&mut,NULL); printf("鎴戞槸涓誨嚱鏁幫紝鎴戞鍦ㄥ垱寤虹嚎紼嬶紒\n"); thread_create(); printf("鎴戞槸涓誨嚱鏁幫紝鎴戞鍦ㄧ瓑寰呯嚎紼嬪畬鎴愪換鍔★紒\n"); thread_wait(); }
鎵ц鐨勭粨鏋滄槸:
鎴戞槸涓誨嚱鏁幫紝鎴戞鍦ㄥ垱寤虹嚎紼嬶紒 thread1: I'm thread 1 thread 1: number=0 綰跨▼1琚垱寤猴紒 thread2: I'm thread 2 thread2 : number=1 綰跨▼2琚垱寤猴紒 鎴戞槸涓誨嚱鏁幫紝鎴戞鍦ㄧ瓑寰呯嚎紼嬪畬鎴愪換鍔★紒 thread 1: number=2 thread2 : number=3 thread 1: number=4 thread 1: number=5 thread2 : number=6 thread 1: number=7 thread2 : number=8 thread 1: number=9 thread2 : number=10 thread1: 涓誨嚱鏁板湪絳夋垜瀹屾垚浠誨姟鍚楋紵 綰跨▼1宸茬粡緇撴潫錛?br>thread2 : 涓誨嚱鏁板湪絳夋垜瀹屾垚浠誨姟涔堬紵 綰跨▼2宸茬粡緇撴潫!
閲嶈:榪欎釜鎵ц鐨勮繃紼嬪ぇ姒傝10縐?!!!!! 鑰屾垜浠敤鑷棆閿?浠g爜:
/* * time :2008.4.30 * author:will cao * Email:sei_michael@126.com * 鎺㈢儲鑷棆閿佷笌淇″彿閲忕殑鍖哄埆 */ #include<pthread.h> #include<stdio.h> pthread_t thread[2]; pthread_spinlock_t lock ; #define MAX 10 int number=0,i; void * thread1() { printf ("thread 1 :I began to run !"); for(i=0;i<MAX;i++) { printf("thread 1 :number=%d \n",number); pthread_spin_lock(&lock); number++; pthread_spin_unlock(&lock); } printf("ok ,I am over !\n"); pthread_exit(NULL); } void * thread2 () { printf("thread2 : I start !!!\n"); for(i=0;i<MAX;i++) { printf("thread2 : number = %d \n",number); pthread_spin_lock(&lock); number++; pthread_spin_unlock(&lock); } printf("thread 2: I am over!!!"); pthread_exit(NULL); } void thread_create(void) { /*create the threads */ pthread_create(&thread[0],NULL,thread1,NULL); printf("create the thread 1\n "); pthread_create(&thread[1],NULL,thread2,NULL); printf("create the thread 2 \n"); } void thread_wait(void ) { /*wait for the thread to be over */ pthread_join(thread[0],NULL); printf("the thread 1 is over !\n"); pthread_join(thread[1],NULL); printf("the thread 2 is over ! \n"); } int main() { /* init the spin lock */ pthread_spin_init(&lock,0); printf("i am the main,and I am creating the threads "); thread_create(); printf("i am the main,and I am wait for the thread to be over!"); thread_wait(); }
鎵ц緇撴灉涓?
i am the main,and I am creating the threads thread 1 :I began to run !thread 1 :number=0 thread 1 :number=1 thread 1 :number=2 thread 1 :number=3 thread 1 :number=4 thread 1 :number=5 thread 1 :number=6 thread 1 :number=7 thread 1 :number=8 thread 1 :number=9 ok ,I am over ! create the thread 1 thread2 : I start !!! create the thread 2 i am the main,and I am wait for the thread to be over!thread2 : number = 10 thread2 : number = 11 thread2 : number = 12 thread2 : number = 13 thread2 : number = 14 thread2 : number = 15 thread2 : number = 16 thread2 : number = 17 thread2 : number = 18 thread2 : number = 19 thread 2: I am over!!!the thread 1 is over ! the thread 2 is over !
鎵ц鏃墮棿:鎴戞病鐢ㄧ郴緇熻皟鐢?浣嗚偗瀹氭槸鐢ㄤ笉浜?.1縐掔殑... 鎬葷粨:浠庤〃闈笂鏉ョ湅,寰堟槑鏄劇殑鍖哄埆鏄綋鎴戜滑鐢ㄧ殑鏄俊鍙烽噺鐨勬椂鍊?榪欎釜鏃跺欐槸鏈夎皟搴︾殑.鍥犱負浠庤繍琛岀粨鏋滀笂鏉ョ湅,涓葷嚎紼嬪湪鍒涘緩鍏朵粬涓や釜綰跨▼鍚?鍏朵粬綰跨▼寮濮嬭繍琛?騫朵笖涓葷嚎紼嬩篃鍦ㄨ繍琛?浣嗘庝箞榪愯榪欎釜鏄棤娉曠‘瀹氱殑,榪欐槸涓涓茍鍙戠殑榪囩▼. 褰撲嬌鐢ㄨ嚜鏃嬮攣鍚?榪欎釜灝變笉涓鏍蜂簡.褰撹繍琛屽埌涓寸晫鍖虹殑鏃跺?瀹冩槸鐩存帴鐨勮繃鍘?涓嶆槸浼氫駭鐢熶竴涓瓑寰?鎴栬呬竴涓皟搴? 涓嶇煡閬撶紪璇戝櫒鏄庝箞緙栬瘧鐨?寰堟兂鐭ラ亾緙栬瘧鍚庝簩榪涘埗浠g爜鏈変粈涔堝尯鍒?浣嗚繖涓ソ鍍忔湁鐐瑰お闅?...涓嶈繃鎴戣寰椾粠榪愯緇撴灉涓婃潵鐪嬭繖涔堝,搴旇宸笉澶氫簡. ]]> 淇″彿閲忎笌鑷棆閿?/title> http://www.shnenglu.com/willcao/archive/2008/04/30/48496.htmlMichaelCao MichaelCao Tue, 29 Apr 2008 17:32:00 GMT http://www.shnenglu.com/willcao/archive/2008/04/30/48496.html 棣栧厛璇磋嚜鏃嬮攣.榪欎釜瀹炵幇鍩烘湰涓婃槸鍜孴SL鐩稿悓.TSL鎸囦護,棣栧厛鏄鍏變韓涓涓猯ock,褰撹繘鍏ヤ復鐣屽尯鏃?棣栧厛灝唋ock澶嶅埗鍒板瘎瀛樺櫒,鐒跺悗灝唋ock緗負1,鎺ヤ笅鏉ョ湅瀵勫瓨鍣ㄤ腑鐨勫兼槸鍚︿負0,涓?榪涘叆.涓嶄負0榪斿洖.鑰屾渶閲嶈鐨勬槸瀹冭兘淇濊瘉鎸囦護鎵ц鐨勪笉鍙垎鍓叉?涔熷氨鏄鍦ㄨ繖鏉℃寚浠ょ粨鏉熶箣鍓?鍏朵粬鎸囦護涓嶅厑璁歌闂唴瀛?瀹炵幇鐨勬槸鏂瑰紡鏄湪鎸囦護鎵ц涔嬪墠灝嗗唴瀛樻葷嚎紱佹.緇撴潫鍚庡湪鎵撳紑鍐呭瓨鎬葷嚎.鑰岃嚜鏃嬮攣瀹炵幇灝辨槸榪欎釜鏍峰瓙.鍙笉榪囧寰幆浜嗗嚑嬈?涓轟簡鏇村ソ鐨勮cpu璋冨害,鍦ㄥ皾璇曚竴瀹氭鏁板悗榪斿洖.鍥犱負浠栨槸涓鐩村湪閭h竟寰幆鎵浠ュ彨鍋氳嚜鏃嬮攣.鍙榪欑閿佸緢鑰楄祫婧?浣嗘槸閫熷害涓婃潵璇村緢蹇?涓鏃﹂攣閲婃斁,绔嬪埢鍙互寰楀埌璧勬簮. 鍐嶆潵鐪嬬湅淇″彿閲?淇″彿閲忕殑瀹炵幇灝變笉榪欒埇綺懼噯浜?濡傛灉浣跨敤涓涓俊鍙烽噺鏉ユ帶鍒朵竴涓復鐣屽尯鐨勮瘽.灝變細鏈夊緢澶氭儏鍐?棣栧厛鏈鏄庢樉鐨勬槸璇昏?鍐欒呴棶棰?鍙互鏈夊涓鑰?鍐欒呭彧鍙互鏈変竴涓?騫朵笖淇″彿閲忕殑瀹炵幇涔熷拰鑷棆閿佹湁鑰呬竴瀹氱殑鍖哄埆.褰撲竴涓俊鍙烽噺涓嶈兘璁塊棶鍚?榪涚▼涓嶄細鍦ㄩ偅閲屽驚鐜?浼氳鐫$湢鎺?褰撲俊鍙烽噺鍙互浣跨敤鐨勬椂鍊?璋冨害鍣ㄤ細浠庡彲浠ヨ皟搴︾殑榪涚▼閫夋嫨涓涓? 鍩烘湰涓婂氨榪欎釜鏍峰瓙.
]]> 灝忔枊瀵勮 http://www.shnenglu.com/willcao/archive/2008/04/28/48290.htmlMichaelCao MichaelCao Sun, 27 Apr 2008 16:13:00 GMT http://www.shnenglu.com/willcao/archive/2008/04/28/48290.html http://www.shnenglu.com/willcao/comments/48290.html http://www.shnenglu.com/willcao/archive/2008/04/28/48290.html#Feedback 0 http://www.shnenglu.com/willcao/comments/commentRss/48290.html http://www.shnenglu.com/willcao/services/trackbacks/48290.html 鍥為,澶у涓夊勾宸茬粡榪囧幓,浜虹敓鏈綺懼崕鐨勯儴鍒嗕篃鍦ㄦ笎娓愮殑嫻侀?鏃跺父鎯沖埌浠涔?瀛﹀埌浠涔堟諱細鍦ㄨ繖鍐欏啓,鍦ㄩ偅鐢葷敾,铏界劧鍘嗙粡璁稿,浣嗕笉鎴愮郴緇?鎬諱箣浼間箮鎯蟲姄浣忎簺浠涔?浣嗘繪湁婊戣繃,鏁呭湪姝ゅ緩涓灝忓眿. 鏈涘鎬?澶氭兂,澶氳.鐝嶆儨闈掓槬.
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