C Programming - Remove Characters within a String

void remove(char src[], char del[])
{
     char hash[26] = {0};
     char *fsrc = del,*fdst;
     int count;
     while(*fsrc) {
          hash[*fsrc - 'a'] = 1;
          fsrc++;
     }
     fsrc = fdst = src;
     while(*fsrc) {
          if ( (*fsrc == ' ') || ( hash[*fsrc - 'a'] == 0 ) ) {
               *fdst = *fsrc;
               fdst++;
          }
          fsrc++;
     }
     *fdst = '\0';
}