(C++) std::valarray

include <iostream>

include <valarray>

include <algorithm>


class Initializer
{
  public:
  Initializer() : index(0) {}
  template <class T> operator()(T& value) { value = index; ++index; }
  private:
  int index;
};
void myCout(const double& t)
{
  std::cout << t << std::endl;
}
int main()
{
  std::valarray<double> myArray(10);
  std::for_each(&myArray[0],&myArray[myArray.size()],Initializer());
  std::cout << "After initialization: " << std::endl;
  std::for_each(&myArray[0],&myArray[myArray.size()],myCout);
  myArray*=myArray;
  std::cout << "After 'myArray*=myArray;':" << std::endl;
  std::for_each(&myArray[0],&myArray[myArray.size()],myCout);
}

Topic links

• #include
• scope operator'::'
• stream out operator '<<'
• algorithm (header file)
• argc
• argv
• assert
• char
• class
• cout
• endl
• for_each
• #include
• int
• iostream
• main
• return
• scope operator'::'
• std
• std::cout
• std::endl
• std::for_each
• stream out operator '<<'