Namespaces
Variants
Views
Actions

std::dynarray::back

From cppreference.com
< cpp‎ | container‎ | dynarray
Revision as of 20:30, 31 May 2013 by P12bot (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
reference back();
(since {std})
const_reference back() const;
(since {std})

Returns reference to the last element in the container.

Calling back on an empty container is undefined.

Contents

[edit] Parameters

(none)

[edit] Return value

Reference to the last element.

[edit] Complexity

Constant.

[edit] Notes

For a container c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }

[edit] Example

The following code uses back to display the last element of a std::dynarray<char>:

#include <dynarray>
#include <iostream>
 
int main()
{
    std::dynarray<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
    if (!letters.empty()) {
        std::cout << "The last character is: " << letters.back() << '\n';
    }  
}

Output:

The last character is f

[edit] See also

access the first element
(public member function) [edit]