Question

How to implement pairwise matches between two vectors in C++

Answer 1

#include <iostream>  
#include <vector> 

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

int pairwise_matches(vector<int> v1, vector<int> &v2)
{
	int sum = 0;

	for (int i = 0; i < v1.size(); i++)
		if (v1[i] == v2[i])
			sum++;

	return sum;
}

int main()
{
	vector<int> v1{ 0, 1, 2, 3, 4 }, v2{ 5, 1, 2, 6, 4 };

	cout << pairwise_matches(v1, v2) << endl;

	return 0;
}

/*
run:

3

*/

 

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