Difference between revisions of "Template:cpp/container/back"
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m (Add the mandatory second template argument) |
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int main() | int main() | ||
{ | { | ||
| − | std::{{{1}}}<char | + | std::{{{1}}}<char> letters {'o', 'm', 'g', 'w', 't', 'f'}; |
if (!letters.empty()) { | if (!letters.empty()) { | ||
Revision as of 14:01, 20 March 2014
| reference back(); |
(since {std}) | |
| const_reference back() const; |
(since {std}) (until C++14) |
|
| constexpr const_reference back() const; |
(since C++14) | |
Returns reference to the last element in the container.
Calling back on an empty container is undefined.
Contents |
Parameters
(none)
Return value
Reference to the last element.
Complexity
Constant.
Notes
For a container c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }
Example
The following code uses back to display the last element of a std::{{{1}}}<char>:
Run this code
#include <{{{1}}}> #include <iostream> int main() { std::{{{1}}}<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
See also
| access the first element (public member function of std::{{{1}}})
|
