Question

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

Answer 1

#include <iostream>  
#include <set> 

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

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

	// Equivalent or goes after
	cout << "lower_bound(4) = " << *st.lower_bound(4) << endl;
	cout << "lower_bound(3) = " << *st.lower_bound(3) << endl;
	cout << "lower_bound(6) = " << *st.lower_bound(6) << endl;

	return 0;
}

/*
run:

lower_bound(4) = 5
lower_bound(3) = 3
lower_bound(6) = 6

*/

 

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