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C++ Deque Library - cbegin() Function
Description
The C++ function std::deque::cbegin() returns a constant random access iterator which points to the beginning of the deque.
Iterator obtained by this member function can be used to iterate container but cannot be used to modify the content of object to which it is pointing even if object itself is not constant.
Declaration
Following is the declaration for std::deque::cbegin() function form std::deque header.
C++11
const_iterator cbegin() const noexcept;
Parameters
None
Return value
Returns a constant random access iterator which points to the beginning of the deque.
Exceptions
This member function never throws exception.
Time complexity
Constant i.e. O(1)
Example
The following example shows the usage of std::deque::cbegin() function.
#include <iostream> #include <deque> using namespace std; int main(void) { deque<int> d = {1, 2, 3, 4, 5}; cout << "Contents of deque are" << endl; for (auto it = d.cbegin(); it != d.cend(); ++it) cout << *it << endl; return 0; }
Let us compile and run the above program, this will produce the following result −
Contents of deque are 1 2 3 4 5
deque.htm
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