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

int main(void)
{

    const char *str =  "{0,1,22,333,4,55,6,77777,8}";
    int tmp, tmp2, tmp3, number;

    printf("filtered number:");

    tmp = 0;
    while(1)
    {
        if( *str == '{' )
        {
            /* begin of current str */
            tmp2 = 0;
            tmp3 = 0;
        }

        if( *str == ',' || *str == '}' )
        {
            /* found a number now */
            tmp++;

            /* get how far the ptr move */
            //printf("ptr moved step: %dn", tmp2);

            /* get the digit len */
            tmp3 = tmp2 - tmp3 - 1;

            /* get the number */
            sscanf(str-tmp3, "%d", &number);
            printf("%d ", number);

            /* record current ptr possition */
            tmp3 = tmp2;
        }

        if ( *str == '}' ) break;

        str++;
        tmp2++;
    }
    printf("n");
    printf("howm any number found: %dn", tmp);

    return 0;
}