Question

How to merge list and set into a vector in C++

Answer 1

#include <iostream>
#include <algorithm>
#include <iterator>
#include <list>
#include <set>
#include <vector>

using std::cout;
using std::endl;
using std::list;
using std::set;
using std::vector;

int main()
{
	list<int> lst = { 0, 1, 2, 3, 4, 5 };
	set<int> st = { 3, 5, 6, 7, 8 };
	vector<int> vec;

	vec.reserve(lst.size() + lst.size() + 1);

	merge(lst.begin(), lst.end(), st.begin(), st.end(), std::back_inserter<vector<int>>(vec));

	std::ostream_iterator<int> output(cout, " ");
	std::copy(vec.begin(), vec.end(), output);

	cout << endl;

	return 0;
}

/*
run:

0 1 2 3 3 4 5 5 6 7 8

*/

 

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