///////    Separate tokens in a string    /////// 

#include        <iostream.h>
#include        <strings.h>
typedef char *String;


String strtok(String s, const char *cs)
{ String token;
  static String spt; // starting pointer 
      if( s != NULL ) spt = s;
      if( *spt == '\0' ) return(NULL);
      // locate beginning of token 
      while( *spt != '\0' && strchr(cs, *spt) != NULL ) spt++;
      token = spt;
      // locate end of token 
      while( *spt != '\0' && strchr(cs, *spt) == NULL ) spt++;
      *spt = '\0' ;
      spt++;
      return(token);
}

#define WHITE "\t \n\r"

#ifdef TEST
int main()
{
        char st1[] = "There it is.";
        char st2[] = "\n \t A string\n \r  of 1 or more   \t tokens";
        String tk = strtok(st1, WHITE);
        do {
                cout << tk << endl;
        } while ( (tk = strtok(NULL, WHITE)) != NULL);

        tk = strtok(st2, WHITE);
        do {
                cout << tk << endl;
        } while ( (tk = strtok(NULL, WHITE)) != NULL);
        return(0);
}
#endif