1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
///
/// @file pi_lehmer.cpp
/// @brief Test the pi_lehmer(x) function.
///
/// Copyright (C) 2023 Kim Walisch, <kim.walisch@gmail.com>
///
/// This file is distributed under the BSD License. See the COPYING
/// file in the top level directory.
///
#include <primecount.hpp>
#include <primecount-internal.hpp>
#include <PiTable.hpp>
#include <stdint.h>
#include <iostream>
#include <cstdlib>
#include <random>
using namespace primecount;
void check(bool OK)
{
std::cout << " " << (OK ? "OK" : "ERROR") << "\n";
if (!OK)
std::exit(1);
}
int main()
{
int threads = get_num_threads();
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<int64_t> dist(0, 1 << 27);
{
int64_t x = -1;
int64_t res = pi_lehmer(x, threads);
std::cout << "pi_lehmer(" << x << ") = " << res;
check(res == 0);
}
for (int64_t x = 0; x <= PiTable::max_cached(); x++)
{
int64_t res1 = pi_lehmer(x, threads);
int64_t res2 = pi_cache(x);
std::cout << "pi_lehmer(" << x << ") = " << res1;
check(res1 == res2);
}
for (int i = 0; i < 1000; i++)
{
int64_t x = dist(gen);
int64_t res1 = pi_lehmer(x, threads);
int64_t res2 = pi_legendre(x, threads);
std::cout << "pi_lehmer(" << x << ") = " << res1;
check(res1 == res2);
}
{
// Test one larger computation: pi(1e11)
int64_t x = 100000000000ll;
int64_t res = pi_lehmer(x, threads);
std::cout << "pi_lehmer(" << x << ") = " << res;
check(res == 4118054813ll);
}
std::cout << std::endl;
std::cout << "All tests passed successfully!" << std::endl;
return 0;
}
|
