A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

Showing content from https://cplusplus.com/deque::push_back below:

public member function

<deque>

std::deque::push_back 
void push_back (const value_type& val);
void push_back (const value_type& val);void push_back (value_type&& val);

Add element at the end

Adds a new element at the end of the deque container, after its current last element. The content of val is copied (or moved) to the new element.

This effectively increases the container size by one.



Parameters
val
Value to be copied (or moved) to the new element.
Member type value_type is the type of the elements in the container, defined in deque as an alias of its first template parameter (T).

Return value none

The storage for the new elements is allocated using the container's allocator, which may throw exceptions on failure (for the default allocator, bad_alloc is thrown if the allocation request does not succeed).



Example 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
// deque::push_back
#include <iostream>
#include <deque>

int main ()
{
  std::deque<int> mydeque;
  int myint;

  std::cout << "Please enter some integers (enter 0 to end):\n";

  do {
    std::cin >> myint;
    mydeque.push_back (myint);
  } while (myint);

  std::cout << "mydeque stores " << (int) mydeque.size() << " numbers.\n";

  return 0;
}
The example uses push_back to add a new element to the container each time a new integer is read.

Complexity Constant.

Iterator validity All iterators related to this container are invalidated. Pointers and references to elements in the container remain valid, referring to the same elements they were referring to before the call.

Data races The container is modified.
No existing elements are accessed (although see iterator validity above).

Exception safetyStrong guarantee: if an exception is thrown, there are no changes in the container.
If allocator_traits::construct is not supported with val as argument, it causes undefined behavior.

See also
deque::push_front
Insert element at beginning (public member function)
deque::pop_back
Delete last element (public member function)
deque::insert
Insert elements (public member function)

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4