Get square root of elements in a valarray : valarray « valarray « C++ Tutorial






#include <iostream>
#include <valarray>
#include <cmath>
using namespace std;
   
int main()
{
  valarray<int> v(10);
  int i;
   
  for(i=0; i<10; i++) v[i] = i;
   
  cout << "Original contents: ";
  for(i=0; i<10; i++)
    cout << v[i] << " ";
  cout << endl;
   
  v = v.cshift(3);
   
  cout << "Shifted contents: ";
  for(i=0; i<10; i++)
    cout << v[i] << " ";
  cout << endl;
   
  valarray<double> fv(5);
  for(i=0; i<5; i++) fv[i] = (double) i;
   
  cout << "Original contents: ";
  for(i=0; i<5; i++)
    cout << fv[i] << " ";
  cout << endl;
   
  fv = sqrt(fv);
   
  cout << "Square roots: ";
  for(i=0; i<5; i++)
    cout << fv[i] << " ";
  cout << endl;
   
   
  return 0;
}








20.1.valarray
20.1.1.Create valarray of bool value by using comparison operator on another valarray
20.1.2.subtracting 10 from each element
20.1.3.Minus 10 from each element in a valarray
20.1.4.Plus two valarrays together
20.1.5.Get square root of elements in a valarray
20.1.6.Use valarray + valarray to double the value for each element in valarray
20.1.7.Do sqrt for all elements in a valarray
20.1.8.Print three-dimensional valarray line-by-line
20.1.9.Print valarray as two-dimensional array
20.1.10.valarray with double value inside