OpenSoure_Repos/TheAlgorithms-C-Plus-Plus
1
0
Fork 0
mirror of https://hub.njuu.cf/TheAlgorithms/C-Plus-Plus.git synced 2023-10-11 13:05:55 +08:00
Code Issues Packages Projects Releases Wiki Activity

rand_r is non-portable and obsolete

Browse Source 
(cherry picked from commit 0ad756f860)
This commit is contained in:
Krishna Vedala 2020-05-26 09:05:29 -04:00
parent a6319c5f43
commit 36b4d59d59
No known key found for this signature in database
GPG Key ID: BA19ACF8FC8792F7
1 changed files with 8 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
math/fast_power.cpp
View File

@ -50,30 +50,28 @@ double fast_power_linear(int64_t a, int64_t b) {
} }
int main() { int main() {
std::srand(time(NULL)); std::srand(std::time(nullptr));
std::ios_base::sync_with_stdio(false); std::ios_base::sync_with_stdio(false);
std::cout << "Testing..." << std::endl; std::cout << "Testing..." << std::endl;
for (int i = 0; i < 20; i++) { for (int i = 0; i < 20; i++) {
unsigned int *rand1, *rand2; int a = std::rand() % 20 - 10;
int a = rand_r(rand1) % 20 - 10; int b = std::rand() % 20 - 10;
int b = rand_r(rand2) % 20 - 10;
std::cout << std::endl << "Calculating " << a << "^" << b << std::endl; std::cout << std::endl << "Calculating " << a << "^" << b << std::endl;
assert(fast_power_recursive(a, b) == std::pow(a, b)); assert(fast_power_recursive(a, b) == std::pow(a, b));
assert(fast_power_linear(a, b) == std::pow(a, b)); assert(fast_power_linear(a, b) == std::pow(a, b));
std::cout << "------ " << a << "^" << b << " = "<< std::cout << "------ " << a << "^" << b << " = "
fast_power_recursive(a, b) << std::endl; << fast_power_recursive(a, b) << std::endl;
} }
int64_t a, b; int64_t a, b;
std::cin >> a >> b; std::cin >> a >> b;
std::cout << a << "^" << b << " = "<< std::cout << a << "^" << b << " = " << fast_power_recursive(a, b)
fast_power_recursive(a, b) << std::endl; << std::endl;
std::cout << a << "^" << b << " = "<< std::cout << a << "^" << b << " = " << fast_power_linear(a, b) << std::endl;
fast_power_linear(a, b) << std::endl;
return 0; return 0;
} }