mono/tests/sieve.cs

   1 /* -*- mode: c -*-
   2  * $Id$
   3  * http://www.bagley.org/~doug/shootout/
   4  */
   5
   6 class Test {
   7 static public int Main() {
   8     //int NUM = ((argc == 2) ? atoi(argv[1]) : 1);
   9     int NUM = 300;
  10     byte[] flags = new byte[8192 + 1];
  11     int i, k;
  12     int count = 0;
  13
  14     while (NUM-- != 0) {
  15         count = 0;
  16         for (i=2; i <= 8192; i++) {
  17             flags[i] = 1;
  18         }
  19         for (i=2; i <= 8192; i++) {
  20             if (flags[i] != 0) {
  21                 // remove all multiples of prime: i
  22                 for (k=i+i; k <= 8192; k+=i) {
  23                     flags[k] = 0;
  24                 }
  25                 count++;
  26             }
  27         }
  28     }
  29     System.Console.WriteLine("Count: {0}\n", count);
  30     return(0);
  31 }
  32 }