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
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| // 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; }
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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)