#include <stdlib.h>
#include <stdio.h>
#include <regex.h>

#define __x_matches 10

int main()
{
    regex_t rx; 
    regmatch_t m[__x_matches];
    char *str = "123.45.67.89";
    char *restr = "\\([0-9][0-9]*\\.[0-9][0-9]*\\)\\.\\([0-9][0-9]*\\)";
    int v1, v2;
    int i;
    
    v1 = regcomp (&rx, restr, 0);
    v2 = regexec (&rx, str, __x_matches, m, 0);

    printf ("Vs got are : %i %i\n", v1, v2);

    for (i=0; i<__x_matches; i++)
    {
	printf ("Some %i<->%i matched\n", m[i].rm_so, m[i].rm_eo);
    }

    return 0;
}