C++ Forward_list Library - forward_list() Function


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Description

The C++ constructor std::forward_list::forward_list() constructs a new list with n elements and assign zero value to each element of list.

Declaration

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

C++11

explicit forward_list (size_type n);

Parameters

n − Number of elements to be inserted into container.

Return value

Constructor never return value.

Exceptions

This member function never throws exception.

Time complexity

Linear i.e. O(n)

Example

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

#include <iostream>
#include <forward_list>

using namespace std;

int main(void) {

   forward_list<int> fl(5);

   cout << "List contains following elements" << 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 contains following elements
0
0
0
0
0
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