c语言中的正则

#include 
#include 
#include 
 
#define SUBSLEN 10
#define BUFLEN 1024 //储存找到的字符串所需空间
 
int main()
{
    char* string="[email protected],[email protected],[email protected]";
    char* pattern="[a-zA-Z0-9]+@[a-zA-Z0-9]+\\.[a-zA-Z0-9]{1,3}";
     
    regex_t regex; //编译后的正则储存在这里
    regmatch_t subs[SUBSLEN]; //子表达式储存在这里
    regcomp(®ex, pattern, REG_EXTENDED);
 
    int offset=0;
    while(regexec(®ex,string+offset,SUBSLEN,subs,0)==0)
    {
        static char matched[BUFLEN]; //匹配的字符串
        int len=subs[0].rm_eo-subs[0].rm_so;
     
        memcpy(matched,string+offset+subs[0].rm_so,len);
        matched[len]='\0';
        printf("match: %s\n", matched);
     
        offset+=subs[0].rm_eo+1;
    }
 
    regfree(®ex);
    return 0;
}