std::valarray<T>::resize
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   void resize( std::size_t count, T value = T() );  | 
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Resizes the valarray to contain count elements and assigns value to each element.
This functions invalidates all pointers and references to elements in the array.
Parameters
| count | - | new size of the container | 
| value | - | the value to initialize the new elements with | 
Return value
(none)
Example
Run this code
#include <iostream> #include <valarray> int main() { std::valarray<int> v{1, 2, 3}; v.resize(10); for (int n : v) std::cout << n << ' '; std::cout << '\n'; }
Output:
0 0 0 0 0 0 0 0 0 0
See also
|   returns the size of valarray  (public member function)  |