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Clementine-audio-player-Mac.../3rdparty/libprojectm/omptl/Example.cpp

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2010-06-06 23:43:45 +02:00
#include <vector>
#include <omptl/omptl_numeric>
#include <omptl/omptl_algorithm>
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <omp.h>
const unsigned N = 100 * (1 << 20);
template <typename T>
struct Sqrt
{
T operator()(const T &x) const { return std::sqrt(x); }
};
int main (int argc, char * const argv[])
{
// Number of threads is derived from environment
// variable "OMP_NUM_THREADS"
std::cout << "Threads: " << omp_get_max_threads() << std::endl;
std::vector<int> v1(N);
omptl::generate(v1.begin(), v1.end(), std::rand);
omptl::sort(v1.begin(), v1.end());
omptl::random_shuffle(v1.begin(), v1.end());
std::vector<int> v2(N);
omptl::transform(v1.begin(), v1.end(), v2.begin(), Sqrt<int>());
std::cout << "Nr 3's: " << omptl::count(v2.begin(), v2.end(), 3)
<< std::endl;
std::cout << "Sum: "
<< omptl::accumulate(v2.begin(), v2.end(), 0) << std::endl;
std::cout << *v1.begin() << std::endl;
return 0;
}