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

SQLite3µÄC±à³Ì

/*=================================
.*  The Standard include file.
.*
.*===============================*/
#include <stdio.h>
#include <stdlib.h>
/*=================================
.*
.*  The extend include file.
.*
.*===============================*/
#include "sqlite3.h"
/* #include "sqlite3ext.h"  */
int main()
{
     /* Connect SQLite system. */
     sqlite3 *pDatabase = NULL;
     int result;
     char sql[500];
     char *err_msg = NULL;
     int i;
     result = sqlite3_open("test.db3", &pDatabase);
     if( result != SQLITE_OK ) {
          printf("Failure to open the database.\n");
          return -1;
     } else
          printf("Good to open the database.\n");
     sprintf(sql,"BEGIN");
     sqlite3_exec(pDatabase, sql,0,0,err_msg);
     sprintf(sql, "CREATE TABLE [TestDB] (\
                   [id] int, [name] varchar(20), [age] int)");
     /*
     if (SQLITE_OK != sqlite3_exec(pDatabase, sql, 0, 0, &err_msg)) {
          printf("operate failed: %s.\n", err_msg);
          return -1;
     }*/
     for(i = 0; i < 10000; i++) {
          sprintf(sql, "INSERT INTO [TestDB] ([id], [name], [age]) \
                    


Ïà¹ØÎĵµ£º

C/C++ÖпÕÖ¸ÕëÓë0ÓëNULLºÍÆäËûÈô¸ÉÎÊÌâС½á

ʲôÊÇ¿ÕÖ¸Õë³£Á¿£¨null pointer constant£©?
[6.3.2.3-3] An integer constant expression with the value 0, or such an expression cast to type void *, is called a null pointer constant.
ÕâÀï¸æËßÎÒÃÇ£º0¡¢0L¡¢'\0'¡¢3 - 3¡¢0 * 17 £¨ËüÃǶ¼ÊÇ“integer constant expression”£©ÒÔ¼° (void*)0 µÈ¶¼ÊÇ¿Õ ......

±ê×¼CµÄÍ·Îļþassert.hѧϰ×ܽá

1£ºÀàËÆjunitµÄ¶ÏÑÔ£¬Ö»ÊÇÔÚassertÖеĶÏÑÔ£¬Èç¹û²»Âú×ãµÄ»°¾Í³ÌÐòÍ˳ö¡£
±ÈÈç
#include <assert.h>

int main(void)
{
assert(6 < 5);
system("pause");
return 0;
}
ÔÚÖ´Ðе½assert(6 < 5);
µÄʱºòÒòΪ²»Âú×ã¶ÏÑÔ£¬ÓÚÊdzÌÐòÍ˳ö¡£
Èç¹û²»ÏëÈÃassert(6 < 5)Æð×÷Ó㬾ÍÔÚ×îÉÏÃæÌí¼Óºê¶¨Òå# ......

ÔÚC#Àï´´½¨ºÍʹÓÃC·ç¸ñÊý¾Ý½á¹¹

ÔÚC#Àï´´½¨ºÍʹÓÃC·ç¸ñÊý¾Ý½á¹¹£¬¼´·ÇÍйܵÄÊý¾Ý½á¹¹£¬¿ÉÒÔÌá¸ßÐÔÄÜ¡£
1 Êý¾Ý½á¹¹µÄ¶¨Òå
¿´ÏÂÃæÀý×Ó£º
    unsafe struct A {
        public int x;
    }
    unsafe struct B {
        pu ......

Cº¯Êýµ÷ÓÃÔ¼¶¨

CÖвÉÓÃÁ˲»Í¬µÄµ÷Ó÷½Ê½À´µ÷Óú¯Êý£¬ÕâÀïµÄº¯Êýµ÷ÓøÅÄî¿ÉÄÜÓëÎÒÃÇͨ³£ËùÀí½âµÄº¯Êýµ÷ÓÃÓÐËù²»Í¬£¬ËüÃÇÖ¸µÄÊÇ´¦ÀíÆ÷ÔÚ´¦Àíº¯ÊýÉϵIJîÒì¡£Àí½âÕâЩ²»Í¬µÄ·½Ê½ÓÐÖúÓÚÎÒÃÇÀ´µ÷ÊÔ³ÌÐòºÍÁ´½ÓÎÒÃǵĴúÂë¡£ÔÚ´ËÎÒÏëÌÖÂÛÒ»ÏÂÖ÷ÒªµÄËÄÖÖº¯Êýµ÷Ó÷½·¨ÒÔ¼°Ö®¼äµÄÇø±ð£¬ËüÃÇÊÇ__stdcall¡¢__cdecl¡¢__fastcall¡¢thiscall¡£µ±È»£¬»¹ÓÐһР......

linux c alarm(0)µÄº¬Òå

Linux C¡¡¡¡alarmº¯Êý---Çë¿´×îºó
¡¡¡¡alarmÒ²³ÆÎªÄÖÖÓº¯Êý£¬Ëü¿ÉÒÔÔÙ½ø³ÌÖÐÉèÖÃÒ»¸ö¶¨Ê±Æ÷£¬µ±¶¨Ê±Æ÷Ö¸¶¨µÄʱ¼äµ½Ê±£¬ËüÏò½ø³Ç·¢ËÍSIGALARMÐźš£Òª×¢ÒâµÄÊÇ£¬Ò»¸ö½ø³ÌÖ»ÄÜÓÐÒ»¸öÄÖÖÓʱ¼ä£¬Èç¹ûÔÚµ÷ÓÃalarm֮ǰÒÑÉèÖùýÄÖÖÓʱ¼ä£¬ÔòÈκÎÒÔǰµÄÄÖÖÓʱ¼ä¶¼±»ÐÂÖµËù´úÌæ¡£
ËùÐèÍ·Îļþ
¡¡¡¡#include<unistd.h>
º¯Ê ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ