C语言使用正则表达式

http://blog.chinaunix.net/uid-479984-id-2114941.html

http://blog.sina.com.cn/s/blog_6a1837e901010ckv.html

http://blog.chinaunix.net/uid-17240700-id-2813921.html

#include<stdio.h>                                                                                                        
#include<sys/types.h>
#include<regex.h>
#include<memory.h>
#include<stdlib.h>

int main(){

    char *bematch = "hhhericchd@gmail.com";
    char *pattern = "h{3,10}(.*)@.{5}.(.*)";
    char errbuf[1024];
    char match[100];
    regex_t reg;
    int err,nm = 10;
    regmatch_t pmatch[nm];

    if(regcomp(&reg,pattern,REG_EXTENDED) < 0){
        regerror(err,&reg,errbuf,sizeof(errbuf));
        printf("err:%s\n",errbuf);
    }

    err = regexec(&reg,bematch,nm,pmatch,0);

    if(err == REG_NOMATCH){
        printf("no match\n");
        exit(-1);

    }else if(err){
        regerror(err,&reg,errbuf,sizeof(errbuf));
        printf("err:%s\n",errbuf);
        exit(-1);
    }

    for(int i=0;i<10 && pmatch[i].rm_so!=-1;i++){
        int len = pmatch[i].rm_eo-pmatch[i].rm_so;
        if(len){
            memset(match,‘\0‘,sizeof(match));
            memcpy(match,bematch+pmatch[i].rm_so,len);
            printf("%s\n",match);
        }
    }
    return 0;
}

gcc -g -o example1 example1.c --std=c99