C++ Forward_list Library - resize_value() Function

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Description

The C++ function std::forward_list::resize_value() changes the size of forward_list. If n is smaller than current size then extra elements are destroyed. If n is greater than current container size then new elements are inserted at the end of list. If val is specified then new elements are initialed with val.

Declaration

Following is the declaration for std::forward_list::resize_value() function form std::forward_list header.

C++11

void resize (size_type n, const value_type& val);

Parameters

• n − Number of element to be inserted.

• val − Initial value for container elements.

Return value

None

Exceptions

If reallocation fails then bad_alloc exception is thrown.

Time complexity

Linear i.e. O(n)

Example

The following example shows the usage of std::forward_list::resize_value() function.

#include <iostream>
#include <forward_list>

using namespace std;

int main(void) {

   forward_list<int> fl;

   fl.resize(5, 10);

   cout << "List contents after resize operation" << endl;

   for (auto it = fl.begin(); it != fl.end(); ++it)
      cout << *it << endl;

   return 0;
}

Let us compile and run the above program, this will produce the following result −

List contents after resize operation
10
10
10
10
10