valarray::operator=

valarray<T>& operator=(const valarray<T>& x);
valarray<T>& operator=(const T& val);
valarray<T>& operator=(const slice_array<T>& sub);
valarray<T>& operator=(const gslice_array<T>& sub);
valarray<T>& operator=(const mask_array<T>& sub);
valarray<T>& operator=(const indirect_array<T>& sub);

Assign content

Parameters

x

Another valarray. The values of its elements are copied to their corresponding elements in the object.
The behavior when lengths do not match in unspecified - depends on the library implementation.

val

All the elements are in the valarray are set to this value.
The length of the valarray is preserved, with each of its element equal to this value.
T is the template type of valarray (the elements' type).

sub

The result of a valarray subscripting operation.

Return value

Example

// valarray assignment example
#include <iostream>
#include <valarray>
using namespace std;

int main ()
{                           //    foo:      bar:

  valarray<int> foo (4);    //  0 0 0 0
  valarray<int> bar (2,4);  //  0 0 0 0   2 2 2 2

  foo = bar;                //  2 2 2 2   2 2 2 2
  bar = 5;                  //  2 2 2 2   5 5 5 5
  foo = bar[slice (0,4,1)]; //  5 5 5 5   5 5 5 5

  cout << "foo sums " << foo.sum() << endl;

  return 0;
}

foo sums 20

See also