mcs/tests/gtest-132.cs

   1 //-- ex-nullable-sqrt
   2
   3 using System;
   4
   5 class MyTest {
   6   public static int? Sqrt(int? x) {
   7     if (x.HasValue && x.Value >= 0)
   8       return (int)(Math.Sqrt(x.Value));
   9     else
  10       return null;
  11   }
  12
  13   public static void Main(String[] args) {
  14     // Prints :2:::
  15     Console.WriteLine(":{0}:{1}:{2}:", Sqrt(5), Sqrt(null), Sqrt(-5));
  16   }
  17 }