C¿âº¯Êý×Ö·û´®´¦Àíº¯ÊýµÄCʵÏÖ(³£¼û)
1.strlen()
ʵÏÖ£º
size_t strlen(const char *s)
{
size_t n;
for(n = 0; *s != '\0'; s++)
++n;
return n;
}
2.strcpy()
ʵÏÖ;
char *strcpy(char *s1, register const char *s2)
{
register const char *p = s1;
while(*p++ = *s2++)
;
return s1;
}
·ÖÎö;
Õâ¸öwhileÑ»·ÊǸö¿ÕÑ»·£¬ËùÓе͝×÷¶¼ÊÇ×÷ΪwhileÑ»·µÄ¿ØÖƱí´ïʽµÄ¸±×÷ÓÃÍê³ÉµÄ¡£
while(*p++ = *s2++)£¬pËùÖ¸ÏòµÄ×Ö·û±»¸³ÖµÎªs2ËùÖ¸ÏòµÄ×Ö·û£¬È»ºópºÍs2¶¼½øÐÐÔöÖµ£¬Ö¸ÏòÏÂÒ»¸ö×Ö·û£¬ÖªµÀs2Ö¸ÏòµÄ×Ö·ûÊÇ'\0'£¨ÆäֵΪ0£©¡£µ±Õâ¸ö0¸³¸øpËùÖ¸ÏòµÄ×Ö·ûʱ£¬Ï൱ÓÚÉèÖÃÁË×Ö·û´®½áÊø±êÖ¾£¬²¢ÇÒÕû¸ö±í´ïʽµÄֵΪ0£¬Í˳öÑ»·¡£
ËùÓвÙ×÷µÄЧ¹ûÊǰÑ×Ö·û´®s2¸´ÖƸøs1¡£
3.strcat()
ʵÏÖ£º
char *strcat(char *s1, register const char *s2)
{
register char *p =s1;
while(*p)
++p;
while(*p++ = *s2++)
;
return s1;
}
·ÖÎö;
ʹÓÃregister´æ´¢ÀàÐÍÊÇΪÁË»ñµÃ×î¿ìµÄÖ´ÐÐËÙ¶È¡£
Ïà¹ØÎĵµ£º
ÏÖÔڵĹ«Ë¾ÕÐÆ¸,¶¼Òª±ÊÊÔÃæÊÔ.Èç¹ûÄã²»ÊÇÄÇÖÖ±à³Ì¹¦µ×·Ç³£ÉîºñµÄÈË,ÓÖ²»ºÃºÃ×¼±¸Ò»·¬,ÔÚ±ÊÊÔÃæÊÔÖÐÍùÍù»á´¦ÓÚ±»¶¯¾ÖÃæ.ËäÈ»ÓÐЩ±ÊÊÔÌâÊǹÊÒâΪÄÑÎÒÃÇ£¬Óеã×êÅ£½Ç¼â.µ«ÊǺܶà±ÊÊÔÌâÃæÊÔÌâȷʵÄܹ»ºÜºÃµØ¿´³öÎÒÃǵĻù´¡. ÔÚÕâÀï,ÎÒ¾ÍÂÔÈ¥ÄÇЩ×êÅ£½Ç¼âµÄÌâ.´ÓcsdnÂÛ̳ÎÒ½ü°ëÄêµÄÊÕ¼¯ÖÐÑ¡³ö10µÀÓдú±íÐÔµÄÌâÄ¿,ÄѶȻù±¾ÉÏÊÇÖ ......
1. ¸ø¶¨µÈʽ A B C D E ÆäÖÐÿ¸ö×Öĸ´ú±íÒ»¸öÊý×Ö£¬ÇÒ²»Í¬Êý×Ö¶ÔÓ¦²»
D F G &nbs ......
ÕâÆªÈÕÖ¾»¹ÊÇÏÈ´ÓÒ»¸öÄܹ»ÔËÐÐÆðÀ´µÄÀý×Ó³ö·¢£¬Ò»µ©ÄÜ˳ÀûµÄ¿´µ½³ÌÐòµÄ³É¹¦ÔËÐУ¬ÄÇô½ÓÏÂÀ´µÄʼþÎÒÏëÓ¦¸ÃÊÇÎÊΪʲôÁË£¿ËƺõÕâÑù¸ü¼ÓÈÝÒ×Àí½âºÍÕÆÎÕ¡£
¶ÔÓÚsocket³ÌÐòµÄ¸ÅÄîÕâÀï¾Í²»¶àдÁË£¬µ«ÎÒÏàÐÅ£¬Èç¹ûÄÜ¿´ÍêÕâÕûƪÎÄÕ£¬ÎÒÏàÐŲ»»áÔÙÓÐÕâÑùµÄÒÉÎʵġ£
ÏÂÃæ½«±àдһ¸öc/s½á¹¹µÄ³ÌÐò£¬Ö÷Òª¹¦ÄÜÊÇclient½«Ïòserver·¢Ë ......
´òÓ¡×Ô¼ºµÄÒ»¶ÎƯÁÁC³ÌÐò
#include <stdio.h>
int main()
{
char *p ="#include <stdio.h>%c int main(){char *p=%c%s%c; printf(p, 10, 34, p, 34);}";
printf(p, 10, 34, p, 34);
} ......