sqrt (<valarray>)
Operates on the elements of an input valarray, returning a valarray whose elements are equal to the square root of the elements of the input valarray.
template<class Type>
valarray<Type> sqrt(
const valarray<Type>& _Left
);
Parameters
- _Left
The input valarray whose elements are to be operated on by the member function.
Return Value
A valarray whose elements are equal to the square root of the elements of the input valarray.
Example
// valarray_sqrt.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
#include <cmath>
int main( )
{
using namespace std;
int i;
valarray<double> va1 ( 6 );
for ( i = 0 ; i < 5 ; i++ )
va1 [ i ] = i * i;
cout << "The initial valarray is: ( ";
for ( i = 0 ; i < 5 ; i++ )
cout << va1 [ i ] << " ";
cout << ")." << endl;
valarray<double> va2 = sqrt ( va1 );
cout << "The square root of the initial valarray is: ( ";
for ( i = 0 ; i < 5 ; i++ )
cout << va2 [ i ] << " ";
cout << ")." << endl;
}
The initial valarray is: ( 0 1 4 9 16 ). The square root of the initial valarray is: ( 0 1 2 3 4 ).
Requirements
Header: <valarray>
Namespace: std