Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

dz̸CÄÚ´æ·ÖÅä2

 ÄÚ´æ·ÖÅ䷽ʽÓÐÈýÖÖ£º
£¨1£© ´Ó¾²Ì¬´æ´¢ÇøÓò·ÖÅä¡£ÄÚ´æÔÚ³ÌÐò±àÒëµÄʱºò¾ÍÒѾ­·ÖÅäºÃ£¬Õâ¿éÄÚ´æÔÚ³ÌÐòµÄ
Õû¸öÔËÐÐÆÚ¼ä¶¼´æÔÚ¡£ÀýÈçÈ«¾Ö±äÁ¿£¬static ±äÁ¿¡£
£¨2£© ÔÚÕ»ÉÏ´´½¨¡£ÔÚÖ´Ðк¯Êýʱ£¬º¯ÊýÄÚ¾Ö²¿±äÁ¿µÄ´æ´¢µ¥Ôª¶¼¿ÉÒÔÔÚÕ»ÉÏ´´½¨£¬º¯
ÊýÖ´ÐнáÊøÊ±ÕâЩ´æ´¢µ¥Ôª×Ô¶¯±»ÊÍ·Å¡£Õ»ÄÚ´æ·ÖÅäÔËËãÄÚÖÃÓÚ´¦ÀíÆ÷µÄÖ¸Á
ÖУ¬Ð§Âʺܸߣ¬µ«ÊÇ·ÖÅäµÄÄÚ´æÈÝÁ¿ÓÐÏÞ¡£
£¨3£© ´Ó¶ÑÉÏ·ÖÅ䣬Òà³Æ¶¯Ì¬ÄÚ´æ·ÖÅä¡£³ÌÐòÔÚÔËÐеÄʱºòÓÃmalloc »ònew ÉêÇëÈÎÒâ¶à
ÉÙµÄÄڴ棬³ÌÐòÔ±×Ô¼º¸ºÔðÔÚºÎʱÓÃfree »òdelete ÊÍ·ÅÄÚ´æ¡£¶¯Ì¬ÄÚ´æµÄÉú´æÆÚ
ÓÉÎÒÃǾö¶¨£¬Ê¹Ó÷dz£Áé»î£¬µ«ÎÊÌâÒ²×î¶à¡£
void GetMemory(char *p)
{
p = (char *)malloc(100);
}
void Test(void)
{
char *str = NULL;
GetMemory(str);
strcpy(str£¬ "hello world");
printf(str);
}
ÇëÎÊÔËÐÐTest º¯Êý»áÓÐʲôÑùµÄ½á¹û£¿
´ð£º³ÌÐò±ÀÀ£¡£
ÒòΪGetMemory ²¢²»ÄÜ´«µÝ¶¯Ì¬Äڴ棬
Test º¯ÊýÖÐµÄ str Ò»Ö±¶¼ÊÇ NULL¡£
strcpy(str£¬ "hello world");½«Ê¹³ÌÐò±À
À£¡£
char *GetMemory(void)
{
char p[] = "hello world";
return p;
}
void Test(void)
{
char *str = NULL;
str = GetMemory();
printf(str);
}
ÇëÎÊÔËÐÐTest º¯Êý»áÓÐʲôÑùµÄ½á¹û£¿
´ð£º¿ÉÄÜÊÇÂÒÂë¡£
ÒòΪGetMemory ·µ»ØµÄÊÇÖ¸Ïò“Õ»ÄÚ´æ”
µÄÖ¸Õ룬¸ÃÖ¸ÕëµÄµØÖ·²»ÊÇ NULL£¬µ«ÆäÔ­
ÏÖµÄÄÚÈÝÒѾ­±»Çå³ý£¬ÐÂÄÚÈݲ»¿ÉÖª¡£
void GetMemory2(char **p£¬ int num)
{
*p = (char *)malloc(num);
}
void Test(void)
{
char *str = NULL;
GetMemory(&str£¬ 100);
strcpy(str£¬ "hello");
printf(str);
}
ÇëÎÊÔËÐÐTest º¯Êý»áÓÐʲôÑùµÄ½á¹û£¿
´ð£º
£¨1£©Äܹ»Êä³öhello
£¨2£©ÄÚ´æÐ¹Â©
void Test(void)
{
char *str = (char *) malloc(100);
strcpy(str£¬ “hello”);
free(str);
if(str £¡= NULL)
{
strcpy(str£¬ “world”);
printf(str);
}
}
ÇëÎÊÔËÐÐTest º¯Êý»áÓÐʲôÑùµÄ½á¹û£¿
´ð£º´Û¸Ä¶¯Ì¬ÄÚ´æÇøµÄÄÚÈÝ£¬ºó¹ûÄÑÒÔÔ¤
ÁÏ£¬·Ç³£Î£ÏÕ¡£
ÒòΪfree(str);Ö®ºó£¬str ³ÉΪҰָÕ룬
if(str £¡= NULL)Óï¾ä²»Æð×÷Óá£
******************


Ïà¹ØÎĵµ£º

SQLite C/C++½Ó¿Ú½éÉÜ

ÕâÆªÎÄÕÂÊÇʹÓÃSQLite C/C++½Ó¿ÚµÄÒ»¸ö¸ÅÒª½éÉܺÍÈëÃÅÖ¸ÄÏ¡£
ÓÉÓÚÔçÆÚµÄSQLiteÖ»Ö§³Ö5¸öC/C++½Ó¿Ú£¬Òò¶ø·Ç³£ÈÝÒ×ѧϰºÍʹÓ㬵«ÊÇËæ×ÅSQLite¹¦ÄܵÄÔöÇ¿£¬ÐµÄC/C++½Ó¿Ú²»¶ÏµÄÔö¼Ó½øÀ´£¬µ½ÏÖÔÚÓг¬¹ý150¸ö²»Í¬µÄAPI½Ó¿Ú¡£ÕâÍùÍùʹ³õѧÕßÍû¶øÈ´²½¡£ÐÒÔ˵ÄÊÇ£¬´ó¶àÊýSQLiteÖеÄC/C++½Ó¿ÚÊÇרÓõģ¬Òò¶øºÜÉÙ±»Ê¹Óõ½¡£¾¡¹ÜÓÐÕâ ......

C/C++±àÒëÆ÷


ºÍÔÚIDEÖбàÒëÏà±È£¬ÃüÁîÐÐģʽ±àÒëËٶȸü¿ì£¬²¢¿ÉÒÔ±ÜÃâ±»IDE²úÉúµÄһЩ¸½¼ÓÐÅÏ¢Ëù¸ÉÈÅ¡£±¾ÎĽ«½éÉÜ΢ÈíC/C++±àÒëÆ÷ÃüÁîÐÐģʽÉ趨ºÍÓ÷¨¡£
 
1¡¢ÉèÖû·¾³±äÁ¿£º
PATH=C:\Program Files\Microsoft Visual Studio 8\VC\bin
INCLUDE=C:\Program Files\Microsoft Visual Studio 8\VC\include
LIB=C:\Program File ......

linux Ï ÓÃcÓïÑÔ´´½¨mysqlÊý¾Ý¿â±Ê¼Ç£¨¶þ£©

linux Ï ÓÃcÓïÑÔ´´½¨mysqlÊý¾Ý¿â±Ê¼Ç£¨¶þ£©
                       
£­£­£­£­£­£­£­Á½¸ö¼òµ¥µÄÀý×Ó£¬¹©²Î¿¼±È½Ï
¡¶ÀýÒ»¡·
#include <stdio.h>
#include <stdlib.h>
#include
&q ......

ɾ³ýC/C++×¢ÊÍ

/********************************************************************
*ɾ³ýC/C++×¢ÊÍ
**********************************************************************/
#include <stdio.h>
//×¢Òâ
//1.¶Ô/****/µÄ´¦Àí
//2.Òª±£ÁôË«ÒýºÅÖ®¼äµÄÄÚÈÝ£¬Èçchar* test = "/*i am not comment */";
//3.¶ÔÓ ......

c·ÖÎöÃæÏò¶ÔÏóµÄʵÏÖ¼¼Êõ

ÃæÏò¶ÔÏó±à³ÌºÍ½á¹¹»¯±à³Ì¼¸ºõÔÚͬһʱÆÚ³öÏÖ¡£µ«ÊÇÓÉÓÚÔçЩʱºòµÄ»úÆ÷»·¾³²»ÔÊÐí£¬ÈçÄÚ´æ¡¢cpuµÈ¡£µ¼ÖÂÃæÏò¶ÔÏó¼¼ÊõûÓеõ½¼°Ê±µÄ·¢Õ¹£¬¶øÍ¬Ê±ÒòΪ½á¹¹»¯³ÌÐò¶ÔÓ²¼þÒªÇó²»ÊÇÄÇôǿÁÒ£¬ËùÒÔ¼°Ê±µÄ·¢Õ¹ÆðÀ´ÁË¡£
µ«ÊÇËäÈ»Èç´Ë£¬¸ü¶àµÄÈËÔÚ̸µ½ÃæÏò¶ÔÏóʱ×ܾõµÃÊÇÖÖÓÅÔ½£¬×ܾõµÃ"¸ßÈËÒ»µÈ"£¬×ÔÈÏΪc++Ò»¶¨±ÈcÓÅÐã¡£ÏÂÃæÍ¨¹ýÓ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ