´òÓ¡×Ô¼ºµÄÒ»¶ÎƯÁÁC³ÌÐò
´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);
}
Ïà¹ØÎĵµ£º
ת×Ô£ºhttp://dev.csdn.net/article/29/29329.shtm
¹ØÓÚÂß¼ÒÆÎ»¡¢ËãÊõÒÆÎ»¿É²Î¼û ѸÀ×Éî´ó±ÊÊÔÌⲿ·Ö¡£µÄÒ»µÀÌâ¡£
ÒÔǰ¿´µ½C++±ê×¼ÉÏ˵£¬ÒÆÎ»ÔËËã·û£¨<<¡¢>>£©³ö½çʱµÄÐÐΪ²¢²»È·¶¨£º
The behavior is undefined if the right operand is negative, or greater than or equal to the length in bit ......
ת×Ô¡¾http://tech.ddvip.com/2008-08/121825219252306_3.html¡¿
ÄÚÈÝÕªÒª£ºÒ»Ö±ÒÔÀ´¶¼¾õµÃprintfËÆºõÊÇcÓïÑÔ¿âÖй¦ÄÜ×îÇ¿´óµÄº¯ÊýÖ®Ò»£¬²»½öÒòΪËüÄܸñʽ»¯Êä³ö£¬¸üÔÚÓÚËüµÄ²ÎÊý¸öÊýûÓÐÏÞÖÆ£¬Òª¼¸¸ö¾Í¸ø¼¸¸ö£¬À´Õß²»¾Ü¡£printfÕâÖÖ¶Ô²ÎÊý¸öÊýºÍ²ÎÊýÀàÐ͵ÄÇ¿´óÊÊÓ¦ÐÔ£¬ÈÃÈ˲úÉúÁ˶ÔËü½øÐÐ̽Ë÷µÄŨºñÐËȤ¡£
¡¾1. ʹÓÃÇéÐ ......
1¡¢¾Ö²¿±äÁ¿ÄÜ·ñºÍÈ«¾Ö±äÁ¿ÖØÃû£¿ ¡¡
¡¡´ð£ºÄÜ£¬¾Ö²¿»áÆÁ±ÎÈ«¾Ö¡£ÒªÓÃÈ«¾Ö±äÁ¿£¬ÐèҪʹÓÃ"::" ;¾Ö²¿±äÁ¿¿ÉÒÔÓëÈ«¾Ö±äÁ¿Í¬Ãû£¬ÔÚº¯ÊýÄÚÒýÓÃÕâ¸ö±äÁ¿Ê±£¬»áÓõ½Í¬ÃûµÄ¾Ö²¿±äÁ¿£¬¶ø²»»áÓõ½È«¾Ö±äÁ¿¡£¶ÔÓÚÓÐЩ±àÒëÆ÷¶øÑÔ£¬ÔÚͬһ¸öº¯ÊýÄÚ¿ÉÒÔ¶¨Òå¶à¸öͬÃûµÄ¾Ö²¿±äÁ¿£¬±ÈÈçÔÚÁ½¸öÑ»·ÌåÄÚ¶¼¶¨ÒåÒ»¸öͬÃûµÄ¾Ö²¿±äÁ¿£¬¶øÄÇ ......
×÷Õߣº
Ôøºê°²£¬»ªÇåÔ¶¼ûǶÈëʽѧԺ
¸ß¼¶½²Ê¦¡£
ÔËËã·ûsizeof¿ÉÒÔ¼ÆËã³ö¸ø¶¨ÀàÐ͵ĴóС£¬¶ÔÓÚ32λϵͳÀ´Ëµ£¬sizeof(char) = 1; sizeof(int) = 4¡£»ù±¾Êý¾ÝÀàÐ͵ĴóСºÜºÃ¼ÆË㣬ÎÒÃÇÀ´¿´Ò»ÏÂÈçºÎ¼ÆËã¹¹ÔìÊý¾ÝÀàÐ͵ĴóС¡£
CÓïÑÔÖеĹ¹ÔìÊý¾ÝÀàÐÍÓÐÈýÖÖ£ºÊý×é¡¢½á¹¹ÌåºÍ¹²ÓÃÌå¡£
Êý×éÊÇÏàͬÀàÐ͵ÄÔªËØµÄ¼¯ºÏ£¬Ö»Òª»á¼ÆËã ......
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 ......