Every random number generator in this library has 64-bit state and can output either 32-bit and 64-bit unsigned integers, as well as floating point numbers. Even the most basic LCG random engine will perform better than the rand function from C.
Links point to wikipedia articles
- Popular, basic and fast, albeit not statistically impressive, the Linear Congruential Generator
- Much improved version of LCG, the Permuted Congruential Generator RECOMMENDED
Simply download the contents of include directory and #include "randshow.hpp" in your code. If you wish to extend the functionality of the library or add your own engines, extend the RNG interface.
auto engine = randshow::pcg::PCG(17); // Custom seed
uint32_t num = engine.next32(); // Completely random 32-bit unsigned integer
uint32_t num_4_7 = engine.next32_range(4, 7); // Random number between 4 and 7
double_t num_0_1 = engine.nextfp(); // Standard uniform distribution
bool is_heads = engine.coin_flip(); // Both balanced and weighted coin flip methods are included// Create a 100 element array filled with random 64-bit unsigned integers
auto nums = std::array<uint64_t, 100>();
for (auto &elt : nums) {
elt = randshow::pcg::default_engine.next64_range(0, 10); // You can use default engine without instanciating your own
}Licensed under the MIT license