function template
<valarray>
std::sqrt
template<class T> valarray<T> sqrt (const valarray<T>& x);
Compute square root of valarray elements
Returns a valarray containing the square root of all the elements of x, in the same order.
The function calls sqrt (unqualified) once for each element.
This function overloads cmath's sqrt.
Parameters
- x
- valarray containing elements of a type for which the unary function sqrt is defined.
Return value
A valarray object with the square roots of the elements of x.
Example
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// sqrt valarray example
#include <iostream> // std::cout
#include <cstddef> // std::size_t
#include <cmath> // std::sqrt(double)
#include <valarray> // std::valarray, std::sqrt(valarray)
int main ()
{
double val[] = {9.0, 25.0, 100.0};
std::valarray<double> foo (val,3);
std::valarray<double> bar = sqrt (foo);
std::cout << "foo:";
for (std::size_t i=0; i<foo.size(); ++i)
std::cout << ' ' << foo[i];
std::cout << '\n';
std::cout << "bar:";
for (std::size_t i=0; i<bar.size(); ++i)
std::cout << ' ' << bar[i];
std::cout << '\n';
return 0;
}
|
Output:
foo: 9 25 100
bar: 3 5 10
|
See also
- sqrt (cmath)
- Compute square root (function)
- pow
- Compute power of valarray elements (function template)
- log
- Compute natural logarithm of valarray elements (function template)