C++博客-Aaron学习笔记-最新评论http://www.cppblog.com/wangfeng2500/CommentsRSS.aspx少壮不努力，长大没饭吃！zh-cnTue, 12 Jul 2011 07:02:22 GMTTue, 12 Jul 2011 07:02:22 GMTcnblogsre: 字符串反序函数http://www.cppblog.com/wangfeng2500/archive/2011/05/04/72241.html#145650huxiaobo136huxiaobo136Wed, 04 May 2011 04:51:00 GMThttp://www.cppblog.com/wangfeng2500/archive/2011/05/04/72241.html#145650

huxiaobo136 2011-05-04 12:51 发表评论
]]>re: 判断一个IP地址是不是合法http://www.cppblog.com/wangfeng2500/archive/2010/10/22/85611.html#130859赞劲小子赞劲小子Fri, 22 Oct 2010 02:27:00 GMThttp://www.cppblog.com/wangfeng2500/archive/2010/10/22/85611.html#130859

赞劲小子 2010-10-22 10:27 发表评论
]]>re: 判断一个IP地址是不是合法http://www.cppblog.com/wangfeng2500/archive/2010/10/20/85611.html#130666huangdi915103@gmai.comhuangdi915103@gmai.comWed, 20 Oct 2010 14:42:00 GMThttp://www.cppblog.com/wangfeng2500/archive/2010/10/20/85611.html#130666忘加了

huangdi915103@gmai.com 2010-10-20 22:42 发表评论
]]>re: 判断一个IP地址是不是合法http://www.cppblog.com/wangfeng2500/archive/2010/10/20/85611.html#130665huangdi915103@gmai.comhuangdi915103@gmai.comWed, 20 Oct 2010 14:31:00 GMThttp://www.cppblog.com/wangfeng2500/archive/2010/10/20/85611.html#130665
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

bool IsIP(char *ip)
{
char *temp = ip;
int nlength =strlen(temp);
if (nlength<7 || nlength>15)
return false;



int nCount = 0;
int nFlag = 0;
while(*temp != '\0')
{
if(*temp == '.')
nCount++;
temp++;
}

char s1[5],s2[5],s3[5],s4[5]; /*存放IP段*/
nFlag = sscanf(ip,"%[^.].%[^.].%[^.].%[^.]",s1,s2,s3,s4);
if(nCount != 3 || nFlag != 4)
return false;

int ip_1,ip_2,ip_3,ip_4;
ip_1 = atoi(s1);
ip_2 = atoi(s2);
ip_3 = atoi(s3);
ip_4 = atoi(s4);

int len_s1,len_s2,len_s3;
len_s1=strlen(s1);
len_s2=strlen(s2);
len_s3=strlen(s3);

if( (0 <= ip_1 && ip_1 <= 255) && (0 <= ip_2 && ip_2 <= 255) && (0 <= ip_3 && ip_3 <= 255) && (0 <= ip_4 && ip_4 <= 255))
{
if (!((s1[0]='0' && len_s1>1) || (s2[0]='0' && len_s2>1) || (s3[0]='0' && len_s3>1))) //确保每段ip不是以0开头
return true;
}
return false;
}

huangdi915103@gmai.com 2010-10-20 22:31 发表评论
]]>re: 判断一个IP地址是不是合法http://www.cppblog.com/wangfeng2500/archive/2010/10/20/85611.html#130659huangdi915103@gmai.comhuangdi915103@gmai.comWed, 20 Oct 2010 13:48:00 GMThttp://www.cppblog.com/wangfeng2500/archive/2010/10/20/85611.html#13065901.01.01.01
验证通不过

huangdi915103@gmai.com 2010-10-20 21:48 发表评论
]]>re: 怎么说呢，哎http://www.cppblog.com/wangfeng2500/archive/2009/05/30/82262.html#86169同学同学Sat, 30 May 2009 07:00:00 GMThttp://www.cppblog.com/wangfeng2500/archive/2009/05/30/82262.html#86169

同学 2009-05-30 15:00 发表评论
]]>