Question

How to swap ranges between vectors in C++

Answer 1

#include <iostream> 
#include <vector>
#include <algorithm>

using std::vector;
using std::cout;  
using std::endl;

void print(int n) {
	cout << n << " ";
}

int main()
{
	vector<int> vec1{ 13, 12, 300, 98, 81 }, vec2{ 1, 2, 3, 4, 5 };
	
	swap_ranges(vec1.begin() + 1, vec1.end() - 1, vec2.begin() + 1);

	for_each(vec1.begin(), vec1.end(), print);

	cout << endl;

	for_each(vec2.begin(), vec2.end(), print);

	cout << endl;

	return 0;
}

/*
run:

13 2 3 4 81
1 12 300 98 5

*/

 

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