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rand_r is non-portable and obsolete

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(cherry picked from commit 0ad756f860)
This commit is contained in:
Krishna Vedala
2020-05-26 09:05:29 -04:00
parent a6319c5f43
commit 36b4d59d59
1 changed files with 8 additions and 10 deletions
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18
math/fast_power.cpp
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@@ -50,30 +50,28 @@ double fast_power_linear(int64_t a, int64_t b) {
}
int main() {
std::srand(time(NULL));
std::srand(std::time(nullptr));
std::ios_base::sync_with_stdio(false);
std::cout << "Testing..." << std::endl;
for (int i = 0; i < 20; i++) {
unsigned int *rand1, *rand2;
int a = rand_r(rand1) % 20 - 10;
int b = rand_r(rand2) % 20 - 10;
int a = std::rand() % 20 - 10;
int b = std::rand() % 20 - 10;
std::cout << std::endl << "Calculating " << a << "^" << b << std::endl;
assert(fast_power_recursive(a, b) == std::pow(a, b));
assert(fast_power_linear(a, b) == std::pow(a, b));
std::cout << "------ " << a << "^" << b << " = "<<
fast_power_recursive(a, b) << std::endl;
std::cout << "------ " << a << "^" << b << " = "
<< fast_power_recursive(a, b) << std::endl;
}
int64_t a, b;
std::cin >> a >> b;
std::cout << a << "^" << b << " = "<<
fast_power_recursive(a, b) << std::endl;
std::cout << a << "^" << b << " = " << fast_power_recursive(a, b)
<< std::endl;
std::cout << a << "^" << b << " = "<<
fast_power_linear(a, b) << std::endl;
std::cout << a << "^" << b << " = " << fast_power_linear(a, b) << std::endl;
return 0;
}