Question

How to get the upper bound of a set in C++

Answer 1

#include <iostream>  
#include <set> 

using std::set;
using std::cout;
using std::endl;

void printList(const set<int>& flist)
{
	for (auto elem : flist) {
		cout << elem << ' ';
	}
	cout << endl;
}

int main()
{
	set<int> st = { 1, 2, 3, 5, 6, 7 };

	printList(st);

	// Pointing to the next element
	cout << "upper_bound(4) = " << *st.upper_bound(4) << endl;
	cout << "upper_bound(3) = " << *st.upper_bound(3) << endl;
	cout << "upper_bound(6) = " << *st.upper_bound(6) << endl;

	return 0;
}

/*
run:

1 2 3 5 6 7
upper_bound(4) = 5
upper_bound(3) = 5
upper_bound(6) = 7

*/

 

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