#include <sys/types.h>

       #include <regex.h>

       int regcomp(regex_t *preg, const char *regex, int cflags);

       int regexec(const regex_t *preg, const char *string, size_t nmatch,

                   regmatch_t pmatch[], int eflags);

       size_t regerror(int errcode, const regex_t *preg, char *errbuf,

                       size_t errbuf_size);

       void regfree(regex_t *preg);

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <regex.h>

#define MATCH_NUM 3

char str[]={"Chinese love China! China, fighting!\n"};

int main(int argc, char **argv)

{

    regex_t reg;

    int ret = , i = ;

    regmatch_t matches[MATCH_NUM];

    char *ps = NULL;

    ret = regcomp(&reg, "Chin.", REG_NEWLINE | REG_EXTENDED);

    if(ret != ){

        perror("regcomp");

        exit();

    }   

    ret = regexec(&reg, str, MATCH_NUM, matches, );

    if(ret != ){

        perror("regexec");

        exit();

    }

    for(i = ; i < MATCH_NUM; i++){

        ps = strndup(str + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);

        if(ps)

            printf("The match %dst is [%s]:[%d:%d]\n", i, ps, matches[i].rm_so, matches[i].rm_eo);

        free(ps);

    }

    regfree(&reg);

    return ;

}

~$gcc regex.c -Wall

~$./a.out

The match 0st is [Chine]:[:]

The match 1st is []:[-:-]

The match 2st is []:[-:-]