C++ Forward_list Library - sort() Function

Description

The C++ function std::forward_list::sort() sorts the elements of the forward_list in ascending order. The order of equal elements is preserved. It uses operator< for comparison.

Declaration

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

C++11

void sort();

Parameters

None

Return value

None

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::sort() function.

#include <iostream>
#include <forward_list>

using namespace std;

int main(void) {

   forward_list<int> fl = {1, 4, 2, 5, 3};

   cout << "List contents before sorting" << endl;
   for (auto it = fl.begin(); it != fl.end(); ++it)
      cout << *it << endl;

   fl.sort();

   cout << "List contents after sorting" << 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 before sorting
1
4
2
5
3
List contents after sorting
1
2
3
4
5