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

C++ Set Library - upper_bound Function

It returns an iterator pointing to the first element in the container which is considered to go after val.

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

iterator upper_bound (const value_type& val) const;

  iterator upper_bound (const value_type& val);
const_iterator upper_bound (const value_type& val) const;

It returns an iterator pointing to the first element in the container which is considered to go after val.

If an exception is thrown, there are no changes in the container.

Time complexity depens on logarithmic.

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

#include <iostream>
#include <set>

int main () {
   std::set<int> myset;
   std::set<int>::iterator itlow,itup;

   for (int i = 1; i < 10; i++) myset.insert(i*10);

   itup = myset.upper_bound (60);

   myset.erase(itup);

   std::cout << "myset contains:";
   for (std::set<int>::iterator it = myset.begin(); it!=myset.end(); ++it)
      std::cout << ' ' << *it;
   std::cout << '\n';

   return 0;
}

The above program will compile and execute properly.

myset contains: 10 20 30 40 50 60 80 90

set.htm

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