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

SQLiteÓëC½áºÏ

SQLite¹Ù·½ÍøÕ¾Àý×Ó£º
#include <stdio.h>
#include <sqlite3.h>
static int callback(void *NotUsed, int argc, char **argv, char **azColName){
int i;
for(i=0; i<argc; i++){
printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
}
printf("\n");
return 0;
}
int main(int argc, char **argv){
sqlite3 *db;
char *zErrMsg = 0;
int rc;
if( argc!=3 ){
fprintf(stderr, "Usage: %s DATABASE SQL-STATEMENT\n", argv[0]);
exit(1);
}
rc = sqlite3_open(argv[1], &db);
if( rc ){
fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
sqlite3_close(db);
exit(1);
}
rc = sqlite3_exec(db, argv[2], callback, 0, &zErrMsg);
if( rc!=SQLITE_OK ){
fprintf(stderr, "SQL error: %s\n", zErrMsg);
sqlite3_free(zErrMsg);
}
sqlite3_close(db);
return 0;
}
ÓÃgcc±àÒë
gcc -lsqlite3 sqlite.c -o sqlite
ÔËÐÐʱ./sqlite ab.db 'SQL Óï¾ä'


Ïà¹ØÎĵµ£º

¹ØÓÚÏßÐÔ±íµÄC³ÌÐò£¬Óï·¨ÎÊÌ⣿²»»á°É

´íÎó¾ÍÏÂÃæÈýÐУ¬£¨¿´µ½µÄ°ïÎÒ¿´¿´ÊÇÄÄÀïµÄÎÊÌâ°¡£©
 \MSDev98\MyProjects\example\ex.c(117) : error C2449: found '{' at file scope (missing function header?)
F:\MSDev98\MyProjects\example\ex.c(120) : error C2059: syntax error : '}'
F:\MSDev98\MyProjects\example\ex.c(122) : error C2059: syntax er ......

C/C++Ö¸ÕëºÍÊý×éµÄʹÓúÍÇø±ð

        
³£¼ûµÄÄÚ´æ·ÖÅäºÍʹÓôíÎó
1) ÄÚ´æµÄÉêÇëºÍ·ÖÅ䲢ûÓгɹ¦£¬µ«³ÌÐòԱȴʹÓÃÁËËü¡£Ò»Ð©ÐÂÊÖ¾­³£»á·¸ÕâÖÖ´íÎó£¬ËûÃDz¢²»»áÁôÒâµ½ÄÚ´æÃ»ÓзÖÅä³É¹¦¡£ÅжÏÖ¸ÕëµÄÖµÊÇ·ñΪNULL¿ÉÒÔÓÐЧµØ±ÜÃâÕâÖÖ´íÎó¡£
2) ÄÚ´æµÄ·ÖÅäÒѾ­³É¹¦£¬µ«ÊÇȴûÓнøÐгõʼ»¯¾ÍÖ±½ÓʹÓÃËüÁË¡£Ê×ÏÈÊ ......

C³ÌÐòÖÐÍ·ÎļþÏ໥°üº¬¾«»ª£¨ÍøÕªÐ¡½á£©

.hÖÐÒ»°ã·ÅµÄÊÇͬÃû.cÎļþÖж¨ÒåµÄ±äÁ¿¡¢Êý×é¡¢º¯ÊýµÄÉùÃ÷£¬ÐèÒªÈÃ.cÍⲿʹÓõÄÉùÃ÷¡£
1)hÎļþ×÷ÓÃ
1 ·½±ã¿ª·¢:°üº¬Ò»Ð©ÎļþÐèÒªµÄ¹²Í¬µÄ³£Á¿,½á¹¹,ÀàÐͶ¨Òå,º¯Êý,±äÁ¿ÉêÃ÷£»
2 Ìṩ½Ó¿Ú:¶ÔÒ»¸öÈí¼þ°üÀ´Ëµ¿ÉÒÔÌṩһ¸ö¸øÍâ½çµÄ½Ó¿Ú(ÀýÈç: stdio.h)¡£
 
2)hÎļþÀïÓ¦¸ÃÓÐʲô
    ³£Á¿,½á¹¹,ÀàÐ ......

linux cÓïÑÔ selectº¯ÊýÓ÷¨

  SelectÔÚSocket±à³ÌÖл¹ÊDZȽÏÖØÒªµÄ£¬¿ÉÊǶÔÓÚ³õѧSocketµÄÈËÀ´Ëµ¶¼²»Ì«°®ÓÃSelectд³ÌÐò£¬ËûÃÇÖ»ÊÇϰ¹ßдÖîÈç connect¡¢accept¡¢recv»òrecvfromÕâÑùµÄ×èÈû³ÌÐò£¨Ëùν×èÈû·½Ê½block£¬¹ËÃû˼Ò壬¾ÍÊǽø³Ì»òÊÇÏß³ÌÖ´Ðе½ÕâЩº¯Êýʱ±ØÐëµÈ
´ýij¸öʼþµÄ·¢Éú£¬Èç¹ûʼþûÓз¢Éú£¬½ø³Ì»òÏ߳̾ͱ»×èÈû£¬º¯Êý²»ÄÜÁ¢¼´·µ» ......

C/C++µ¥Ôª²âÊÔÀíÂÛ¾«Òª£¨¾Å£©

3.2 ¸ßЧÂʲâÊÔ£ºËÄÁ½°Îǧ½ï
 
    ÉÏÒ»½Ú½éÉÜÁËÒ»Ð©ËÆÊǶø·ÇµÄ¸ßЧÂÊ·½·¨£¬ÄÇô£¬ÔõÑù²ÅÄÜÕæÕý¸ßЧÂʲâÊÔÄØ£¿ÕæÕýµÄ¸ßЧÂÊ£¬²»ÄܺöÂÔÈ˵ÄÖÇ»ÛÕâÒ»¹Ø¼üÒòËØ¡£
ÓÉÓÚ¹¤¾ß²»¿ÉÄÜ×Ô¶¯Á˽â´úÂëµÄÉè¼Æ¹¦ÄÜ£¬Ö»ÓÐÈ˲ÅÁ˽⣬Òò´Ë£¬Ö»ÓÐÈ˵ÄÖǻۼ°Ê±½éÈ룬¹¤¾ß²ÅÄÜ×öÕýÈ·µÄÊÂÇ飬²ÅÄÜ´ïµ½ÕæÕýµÄ¸ßЧÂÊ¡£
&nb ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ