c正則匹配小計

參考地址：

ibm手冊http://publib.boulder.ibm.com/infocenter/iseries/v7r1m0/index.jsp?topic=%2Frtref%2Fregcomp.htm

書籍http://book.douban.com/subject/3794240/

csdn閱讀http://blog.csdn.net/wwwljc/article/details/6159644

c++11正則http://www.cnblogs.com/yejianfei/archive/2012/10/07/2713715.html

幾個Regex（郵箱email，ipv4）匹配：

#include <sys/types.h>#include <regex.h>#include <stdio.h>int main(int argc, char *argv[]){        regex_t regex;        int reti;        char msgbuf[100];const char *reg_exp = "^\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*$";
//ipv4  '^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\\.){3}(25[0-5]|2[0-4][0-9]|1[09][0-9]|[1-9][0-9]|[0-9])$'
/* Compile regular expression */        reti = regcomp(&regex, reg_exp, REG_EXTENDED);        if( reti ){ fprintf(stderr, "Could not compile regex\n"); exit(1); }/* Execute regular expression */        reti = regexec(&regex, "wangkangluo1@136.com", 0, NULL, 0);        if( !reti ){                puts("Match");        }        else if( reti == REG_NOMATCH ){                puts("No match");        }        else{                regerror(reti, &regex, msgbuf, sizeof(msgbuf));                fprintf(stderr, "Regex match failed: %s\n", msgbuf);                exit(1);        }/* Free compiled regular expression if you want to use the regex_t again */        regfree(&regex);        return 0;}

 

完