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

int main(){
    char *pattern = "[0-9]{3}";
    char *str = "Match me? 546 ok";
    regex_t *re_ptr; //ÕýÔòÖ¸Õë
    size_t nmatch = 1;//×î¶àÆ¥Åä¸öÊý
    regmatch_t match[1];//Æ¥Åä½á¹ûλÖüǼÊý×é
   
    regcomp(re_ptr,pattern,REG_EXTENDED); //±àÒëÕýÔò±í´ïʽ
    regexec(re_ptr,str,nmatch,match,0);
   
    printf("Æ¥Åä½á¹ûÔÚstrÖÐµÄÆðʼλÖãº%ld\n",match[0].rm_so);
    printf("Æ¥Åä½á¹ûÔÚstrÖеĽáÊøÎ»Öãº%ld\n",match[0].rm_eo);
   
    exit(EXIT_SUCCESS);

}

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regex_t *re_ptr ûÓзÖÅäÄÚ´æ

C/C++ code:
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <regex.h>

int main()
{
char *pattern = "[0-9]{3}";


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#include"stdio.h"
#include"stdlib.h"
void ContrTwo(char i)
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char str1[8];
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}
unsigned char leftRot(char str,int i);
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