// Example 72 from page 53 of Java Precisely second edition (The MIT Press 2005)
// Author: Peter Sestoft (sestoft@itu.dk)


class Example72 {
  public static void main(String[] args) {
    System.out.println("Thursday is " + wdayno2("Thursday"));
  }

  static int wdayno2(String wday) {
    int i=0;
    while (i < wdays.length && ! wday.equals(wdays[i]))
      i++;
    // Now i >= wdays.length or wday equal to wdays[i]
    if (i < wdays.length)
      return i+1;
    else
      return -1;                                // Here used to mean `not found'
  }

  static final String[] wdays = 
  { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };
}