CÏÝÚ壺ÅжϺêÊÇ·ñµÈÓÚÒ»¸ö³£Êý
ÏÂÃæÕâ¶Î´úÂëÓÐɶ´íÎó£¿
#if ULONG_MAX == 0xFFFFFFFF
inline unsigned long byte_swap(unsigned long x) { return __builtin_bswap32(x); }
inline long byte_swap(long x) { return __builtin_bswap32(x); }
#else
inline unsigned long byte_swap(unsigned long x) { return __builtin_bswap64(x); }
inline long byte_swap(long x) { return __builtin_bswap64(x); }
#endif // ULONG_MAX
µ± ULONG_MAX 䶨Òåʱ£¬±»ÅжÏΪ¼Ù£¡¶àôΣÏÕµÄÒ»¸öÏÝÚ壡
Ôö¼ÓÒÔÏÂÑéÖ¤¼´¿É²é´í£º
#ifdef ULONG_MAX
# if ULONG_MAX != 0xFFFFFFFFul
# if ULONG_MAX != 0xFFFFFFFFFFFFFFFFul
# error "ULONG_MAX error" is ULONG_MAX
# endif
# endif
#else
# error "ULONG_MAX is not defined"
#endif
Õâ¸ö bug ºÄ·ÑÁËÎÒÁ½¸öСʱ£¡
Ïà¹ØÎĵµ£º
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 ......
×î½üʵÔÚÊÇ̫æÁË£¬ÕâÆªÕûÕû¾ÍÍÆ³ÙÁË1¸öÔÂÁË£¬ÊµÔÚÊǶԲ»Æð¡£Ö®Ç°±¾´òËãÕâ¸öÄ£¿é¾Í½áÊøÁË£¬Îļþ²Ù×÷¾Í²»Ð´ÁË£¬µ«ÊÇÎļþ²Ù×÷ÓÖÊÇÒ»¸öºÜÖØÒªµÄ¶«Î÷£¬¶øÇÒÒ²¸ÕºÃÄܹ»×ܽá֮ǰÎÒÃÇѧϰµÄËùÓÐ֪ʶ¡£Í¬Ê±Ò²ÎªÁ˽«Îļþ²Ù×÷Õâ¸ö³õѧÕßÈÏΪºÜÉñÃØµÄ¶«Î÷¸ø±¾ÖÊ»¯¡£Òò´Ë£¬±¾Æª½«ÖðÒ»½éÉÜCÓïÑÔµÄÎļþ²Ù×÷¡££¨±¾Ä£¿éµÄÃüÃû±¾À´ÊÇÏëC\C++Ò ......
pFn¡¡t1(void);
pFn¡¡t2(void);
int main()
{
¡¡¡¡pFn fn = t1 ;
¡¡¡¡while(1){
¡¡¡¡¡¡¡¡fn = fn();¡¡¡¡//Õâ¸ö£¬´ó¼Ò¿´Çå³þÁË
¡¡¡¡}
}
pFn¡¡t1()
{
¡¡¡¡printf("t1\n");
¡¡¡¡return t2 ;
}
pFn¡¡t2()
{
¡¡¡¡printf("t2\n");
¡¡¡¡return t1 ;
}
ÇëÎÊ£¬Ïëͨ¹ý±àÒ룬pFnº¯ÊýÖ¸ÕëÀàÐÍ ......
1.ʹÓÃCÓïÑÔÀ´²Ù×÷SQL SERVERÊý¾Ý¿â,²ÉÓÃODBC¿ª·ÅʽÊý¾Ý¿âÁ¬½Ó½øÐÐÊý¾ÝµÄÌí¼Ó,ÐÞ¸Ä,ɾ³ý,²éѯµÈ²Ù×÷¡£
step1:Æô¶¯SQLSERVER·þÎñ,ÀýÈç:HNHJ,¿ªÊ¼²Ëµ¥ ->ÔËÐÐ ->net start mssqlserver
step2:´ò¿ªÆóÒµ¹ÜÀíÆ÷,½¨Á¢Êý¾Ý¿âtest,ÔÚtest¿âÖн¨Á¢test±í(a varchar(200),b varchar(200))
step3:½¨Á¢ÏµÍ³DSN,¿ªÊ¼²Ëµ ......
int arr[]={6,7,8,9,10};
int *ptr=arr;
*(ptr++)+=123;
printf("%d,%d",*ptr,*(++ptr));
´ËÌâ×îºóµÄ½á¹ûÊÇ8£¬8.
Õ§¿´½á¹ûÓ¦¸ÃÊÇ7ºÍ8¡£
ÔÀí£º
ÒòΪËüÃÇ×÷ΪprintfµÄ²ÎÊý£¬º¯Êýprintf´Ó×óÍùÓÒ¶ÁÈ¡£¬È»ºó½«ÏȶÁÈ¡·Åµ½Õ»µ×£¬×îºó¶ÁÈ¡µÄ·ÅÔÚÕ»¶¥£¬´¦ÀíʱºòÊÇ´ÓÕ»¶¥¿ªÊ¼µÄ£¬ËùÓÐÎÒÃÇ¿´¼ûµÄ½á¹ûÊÇ£¬´ÓÓұ߿ªÊ¼´¦ÀíµÄ¡£ ......