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Assign a list with array elements | C++ STL

Here, we are going to learn how to assign a list with the elements of an array in C++ STL?
Submitted by IncludeHelp, on November 02, 2018

Given an array and we have to create a list, that should be assigned with all elements of the array using C++ (STL) program.

Example:

Here, we are declaring a list list1 and an array arr, arr has 5 elements, all elements of the arr are assigning to the list list1 by using following statements,

    list1.assign(arr+0, arr+5);

Here,

• list1 is a list of integer type
• arr is an integer array
• arr+0 points the first element of the array
• And, arr+4 points the last element of the array

Program:

#include <iostream>
#include <list>
using namespace std;

//function to display the list
void dispList(list<int> L)
{
	//declaring iterator to the list
	list<int>::iterator l_iter;
	for (l_iter = L.begin(); l_iter != L.end(); l_iter++)
		cout<< *l_iter<< " ";
	cout<<endl;
}

int main()
{
	//list1 declaration
	list<int> list1;
	//array declaration
	int arr[]={10, 20, 30, 40, 50};

	//displaying list1
	cout<<"Before assign... "<<endl;
	cout<<"Size of list1: "<<list1.size()<<endl;
	cout<<"Elements of list1: ";
	dispList(list1);

	//assigning array Elements to the list
	list1.assign(arr+0, arr+5);

	//displaying list1
	cout<<"After assigning... "<<endl;
	cout<<"Size of list1: "<<list1.size()<<endl;
	cout<<"Elements of list1: ";
	dispList(list1);

	return 0;
}

Output

Before assign...
Size of list1: 0
Elements of list1:
After assigning...
Size of list1: 5
Elements of list1: 10 20 30 40 50