test/random_test.cc
author Alpar Juttner <alpar@cs.elte.hu>
Wed, 29 Jul 2020 14:56:10 +0200
changeset 1433 a278d16bd2d0
parent 463 88ed40ad0d4f
permissions -rw-r--r--
Fix clang compilation issue (#634)
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2009
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #include <lemon/random.h>
    20 #include "test_tools.h"
    21 
    22 int seed_array[] = {1, 2};
    23 
    24 int rnd_seq32[] = {
    25 2732, 43567, 42613, 52416, 45891, 21243, 30403, 32103, 
    26 62501, 33003, 12172, 5192, 32511, 50057, 43723, 7813, 
    27 23720, 35343, 6637, 30280, 44566, 31019, 18898, 33867, 
    28 5994, 1688, 11513, 59011, 48056, 25544, 39168, 25365, 
    29 17530, 8366, 27063, 49861, 55169, 63848, 11863, 49608
    30 };
    31 int rnd_seq64[] = {
    32 56382, 63883, 59577, 64750, 9644, 59886, 57647, 18152, 
    33 28520, 64078, 17818, 49294, 26424, 26697, 53684, 19209, 
    34 35404, 12121, 12837, 11827, 32156, 58333, 62553, 7907, 
    35 64427, 39399, 21971, 48789, 46981, 15716, 53335, 65256, 
    36 12999, 15308, 10906, 42162, 47587, 43006, 53921, 18716
    37 };
    38 
    39 void seq_test() {
    40   for(int i=0;i<5;i++) {
    41     lemon::Random32 r32(i);
    42     lemon::Random64 r64(i);
    43     for(int j=0;j<8;j++) {
    44       check(r32[65536]==rnd_seq32[i*8+j], "Wrong random sequence");
    45       check(r64[65536]==rnd_seq64[i*8+j], "Wrong random sequence");
    46     }
    47   }
    48 }
    49 
    50 
    51 int main()
    52 {
    53   double a=lemon::rnd();
    54   check(a<1.0&&a>0.0,"This should be in [0,1)");
    55   a=lemon::rnd.gauss();
    56   a=lemon::rnd.gamma(3.45,0);
    57   a=lemon::rnd.gamma(4);
    58   //Does gamma work with integer k?
    59   a=lemon::rnd.gamma(4.0,0);
    60   a=lemon::rnd.poisson(.5);
    61 
    62   lemon::rnd.seed(100);
    63   lemon::rnd.seed(seed_array, seed_array +
    64                   (sizeof(seed_array) / sizeof(seed_array[0])));
    65 
    66   seq_test();
    67   return 0;
    68 }