Question

How to reverse copy deque of strings to other deque in C++

Answer 1

#include <iostream>
#include <deque>
#include <string>

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

int main()
{
	deque<string> dq1{ "c", "c++", "java" }, dq2(3);

	copy(dq1.rbegin(), dq1.rend(), dq2.begin());

	for (string val : dq2)
		cout << val << " ";
	
	cout << endl;

	return 0;
}

/*
run:

java c++ c

*/

 

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Answer 2

#include <iostream>
#include <deque>
#include <string>

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

int main()
{
	deque<string> dq{ "c", "c++", "java" }, dq_rev;

	while (!dq.empty()) {
		dq_rev.push_front(dq.front());
		dq.pop_front();
	}

	for (string val : dq_rev)
		cout << val << " ";

	cout << endl;

	return 0;
}

/*
run:

java c++ c

*/

 

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