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///
/// @file api_c.cpp
/// @brief Test primecount's C API.
///
/// Copyright (C) 2020 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.h>
#include <stdint.h>
#include <iostream>
#include <string>
#include <cstdlib>
void check(bool OK)
{
std::cout << " " << (OK ? "OK" : "ERROR") << "\n";
if (!OK)
std::exit(1);
}
int main()
{
std::cout << "primecount version: " << primecount_version() << std::endl;
std::cout << "threads: " << primecount_get_num_threads() << std::endl;
primecount_set_num_threads(3);
std::cout << "new threads: " << primecount_get_num_threads() << std::endl;
int64_t n = (int64_t) 1e10;
int64_t res = primecount_pi(n);
std::cout << "primecount_pi(" << n << ") = " << res;
check(res == 455052511);
n = 455052511;
res = primecount_nth_prime(n);
std::cout << "primecount_nth_prime(" << n << ") = " << res;
check(res == 9999999967);
n = (int64_t) 1e12;
int64_t a = 78498;
res = primecount_phi(n, a);
std::cout << "primecount_phi(" << n << ", " << a << ") = " << res;
check(res == 37607833521);
const char* in = "1000000000000";
char out[32];
primecount_pi_str(in, out, 32);
std::cout << "primecount_pi_str(" << in << ") = " << out;
check(std::string(out) == "37607912018");
std::cout << std::endl;
std::cout << "All tests passed successfully!" << std::endl;
return 0;
}
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