Question

How to swap deques in C++

Answer 1

#include <iostream>
#include <deque>

using std::cout;
using std::endl;
using std::deque;

int main()
{
	deque<char> dq1{ 'a', 'b', 'c', 'd', 'e' }, dq2{ '1', '2', '3' };

	dq1.swap(dq2);

	for (char val : dq1)
		cout << val << " ";
	cout << endl;
	
	for (char val : dq2)
		cout << val << " ";
	cout << endl;

	cout << dq1.size() << " " << dq2.size() << endl;

	return 0;
}

/*
run:

1 2 3
a b c d e
3 5

*/

 

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