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/C++std::map<Key,T,Compare,Allocator>::rbegin, std::map<Key,T,Compare,Allocator>::crbegin
| (1) | ||
reverse_iterator rbegin(); | (until C++11) | |
reverse_iterator rbegin() noexcept; | (since C++11) | |
| (2) | ||
const_reverse_iterator rbegin() const; | (until C++11) | |
const_reverse_iterator rbegin() const noexcept; | (since C++11) | |
const_reverse_iterator crbegin() const noexcept; | (3) | (since C++11) |
Returns a reverse iterator to the first element of the reversed map. It corresponds to the last element of the non-reversed map. If the map is empty, the returned iterator is equal to rend().
Parameters
(none).
Return value
Reverse iterator to the first element.
Complexity
Constant.
Example
#include <iomanip>
#include <iostream>
#include <map>
#include <string_view>
int main()
{
const std::map<int, std::string_view> coins
{
{10, "dime"},
{100, "dollar"},
{50, "half dollar"},
{5, "nickel"},
{1, "penny"},
{25, "quarter"}
}; // initializer entries in name alphabetical order
std::cout << "US coins in circulation, largest to smallest denomination:\n";
for (auto it = coins.crbegin(); it != coins.crend(); ++it)
std::cout << std::setw(11) << it->second << " = ¢" << it->first << '\n';
}Output:
US coins in circulation, largest to smallest denomination:
dollar = ¢100
half dollar = ¢50
quarter = ¢25
dime = ¢10
nickel = ¢5
penny = ¢1See also
|
(C++11) | returns a reverse iterator to the end (public member function) |
|
(C++14) | returns a reverse iterator to the beginning of a container or array (function template) |
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