C++ Deque assign

The assign function in C++ for deque assigns fresh data to the container and adjusts its size accordingly.

Syntax

void assign(InputIterator first, InputIterator last);
void assign(int n,value_type val);

Parameter

The (first,last) parameter specifies the range within which the new elements will be added.

It specifies the updated capacity of the deque data structure.

val : New value to be inserted.

Return value

It does not return any value.

Example 1

Let's see a simple example

#include <iostream>
#include<deque>
using namespace std;
int main()
{
   deque<int> first={1,2,3,4};
   deque<int> second;
   deque<int>::iterator itr=second.begin();
   second.assign(first.begin(),first.end());
   for(itr=second.begin();itr!=second.end();++itr)
   std::cout <<*itr<<" ";
    return 0;
}

Output:

1 2 3 4

In this instance, the assign method assigns the content of the initial container to the secondary container.

Example 2

Let's see a simple example

#include <iostream>
#include<deque>
using namespace std;
int main()
{
  deque<int> deq;
  deque<int>::iterator itr;
  deq.assign(5,6);
  for(itr=deq.begin();itr!=deq.end();++itr)
  std::cout << *itr <<" ";
  return 0;
}

Output:

6 6 6 6 6

In this instance, the assign method sets the value '6' repeatedly five times within the deq container.