Question

How to find the first element in the range of elements in vector with C++

Answer 1

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

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

int main()
{
	vector<int> v1 = { 9, 1, 2, 3, 4, 1, 2, 3, 5, 1, 2, 3 };
	vector<int> v2 = { 1, 2, 3 };
	vector<int>::iterator it;

	it = find_first_of(v1.begin(), v1.end(), v2.begin(), v2.end());

	cout << *it << " previous element: " << *(it - 1) << endl;

	return 0;
}


/*
run:

1 previous element: 9

*/

 

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