C 語言正則

1 #include <regex.h>
  2 #include <iostream>
  3 #include <sys/types.h>
  4 #include <stdio.h>
  5 #include <cstring>
  6 using namespace std;
  7 int main()
  8 {
  9         char pattern[20]="(.*)[0-9]{8}(.*)";
 10         char buffer[]="run_log_201601011.txt";
 11         const size_t nmatch = 1;
 12         regmatch_t pm[nmatch];
 13         regex_t reg; 
 14         int z,i;
 15         
 16         regcomp(&reg,pattern,REG_EXTENDED);
 17         
 18         z = regexec(&reg,buffer,nmatch,pm,REG_NOTBOL);
 19         
 20         if(z == REG_NOMATCH)
 21         {       
 22                 printf("match faild!\r\n");
 23         }else{
 24                 printf("match ok\r\n");
 25         
 26                 for(i=pm[0].rm_so;i<pm[0].rm_eo;++i)
 27                 {printf("%c",buffer[i]);}
 28                 printf("\r\n");
 29         }       
 30                 
 31         regfree(&reg);
 32         return 0;
 33 }