The Tor Browser / file comparison
comparison: media/webrtc/trunk/testing/gtest/samples/sample1.cc
media/webrtc/trunk/testing/gtest/samples/sample1.cc
- branch
- TOR_BUG_3246
- changeset 5
- 4ab42b5ab56c
equal
deleted
inserted
replaced
| -1:000000000000 | 0:c9ea1886cb19 |
|---|---|
| 1 // Copyright 2005, Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 // A sample program demonstrating using Google C++ testing framework. | |
| 31 // | |
| 32 // Author: wan@google.com (Zhanyong Wan) | |
| 33 | |
| 34 #include "sample1.h" | |
| 35 | |
| 36 // Returns n! (the factorial of n). For negative n, n! is defined to be 1. | |
| 37 int Factorial(int n) { | |
| 38 int result = 1; | |
| 39 for (int i = 1; i <= n; i++) { | |
| 40 result *= i; | |
| 41 } | |
| 42 | |
| 43 return result; | |
| 44 } | |
| 45 | |
| 46 // Returns true iff n is a prime number. | |
| 47 bool IsPrime(int n) { | |
| 48 // Trivial case 1: small numbers | |
| 49 if (n <= 1) return false; | |
| 50 | |
| 51 // Trivial case 2: even numbers | |
| 52 if (n % 2 == 0) return n == 2; | |
| 53 | |
| 54 // Now, we have that n is odd and n >= 3. | |
| 55 | |
| 56 // Try to divide n by every odd number i, starting from 3 | |
| 57 for (int i = 3; ; i += 2) { | |
| 58 // We only have to try i up to the squre root of n | |
| 59 if (i > n/i) break; | |
| 60 | |
| 61 // Now, we have i <= n/i < n. | |
| 62 // If n is divisible by i, n is not prime. | |
| 63 if (n % i == 0) return false; | |
| 64 } | |
| 65 | |
| 66 // n has no integer factor in the range (1, n), and thus is prime. | |
| 67 return true; | |
| 68 } |
