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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_set_cbegin.htm below:

C++ Set Library - cbegin Function

It returns a const_iterator pointing to the first element in the container.

Following are the ways in which std::set::cbegin works in various C++ versions.

const_iterator cbegin() const noexcept;

const_iterator cbegin() const noexcept;

It returns a const_iterator pointing to the first element in the container.

It never throws exceptions.

Time complexity is contstant.

The following example shows the usage of std::set::cbegin.

#include <iostream>
#include <set>

int main () {
   std::set<int> myset = {50,40,30,20,10};

   std::cout << "myset contains:";
   for (auto it = myset.cbegin(); it != myset.cend(); ++it)
      std::cout << ' ' << *it;

   std::cout << '\n';

   return 0;
}

The above program will compile and execute properly.

myset contains: 10 20 30 40 50

set.htm

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