std::forward_list::reverse() is an inbuilt function in CPP STL which reverses the order of the elements present in the forward_list.
Syntax:
forwardlist_name.reverse()
Parameter: The function does not accept any parameter.
Return value: The function has no return value. It reverses the forward list.
Below program demonstrates the above function:
Program 1:
CPP
// C++ program to illustrate the // reverse() function #include <bits/stdc++.h> using namespace std;
int main()
{ // initialising forward list
forward_list< int > forward = { 10, 20, 40, 30, 70 };
cout << "List elements before performing reverse operation: " ;
for ( auto it = forward.begin(); it != forward.end(); ++it)
cout << *it << " " ;
// Function that performs reverse operation
forward.reverse();
// printing elements of list
cout << "\nList elements after performing reverse operation: " ;
for ( auto it = forward.begin(); it != forward.end(); ++it)
cout << *it << " " ;
return 0;
} |
Output
List elements before performing reverse operation: 10 20 40 30 70 List elements after performing reverse operation: 70 30 40 20 10
Time Complexity: O(n)
Auxiliary Space: O(n)