iposva@google.com
68f4d6aab9
- Reenable pi_test for VM based runs. Review URL: https://chromiumcodereview.appspot.com//10383293 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@7882 260f80e4-7a28-3924-810f-c04153c831b5
33 lines
906 B
Dart
33 lines
906 B
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test that the default PRNG does converge towards Pi when doing a Monte Carlo
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// simulation.
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// Library tag to allow Dartium to run the test.
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#library("pi_test.dart");
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#import("dart:math");
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void main() {
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var seed = new Random().nextInt((1<<32) - 1);
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print("pi_test seed: $seed");
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var prng = new Random(seed);
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var outside = 0;
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var inside = 0;
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for (var i = 0; i < 600000; i++) {
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var x = prng.nextDouble();
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var y = prng.nextDouble();
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if ((x*x) + (y*y) < 1.0) {
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inside++;
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} else {
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outside++;
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}
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}
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// Mmmmh, Pie!
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var pie = 4.0 * (inside/(inside + outside));
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print("$pie");
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Expect.isTrue(((PI - 0.009) < pie) && (pie < (PI + 0.009)));
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}
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