Create valarray of bool value by using comparison operator on another valarray : valarray « valarray « C++ Tutorial

1. C++ Tutorial
2. valarray
3. valarray

#include <iostream>
#include <valarray>
#include <cmath>
using namespace std;

int main()
{
  valarray<int> v(10);

  for(int i=0; i<10; i++)
      v[i] = i;

  cout << "Original contents: ";
  for(int i=0; i<10; i++)
    cout << v[i] << " ";

  valarray<bool> vb = v < 5;
  cout << "Those elements less than 5: ";
  for(int i=0; i<10; i++)
    cout << vb[i] << " ";

  cout << endl;
}

Original contents: 0 1 2 3 4 5 6 7 8 9 Those elements less than 5: 1 1 1 1 1 0 0 0 0 0