CODE EXAMPLE FOR CPP

c++ find index of an element

#include <iostream>
#include <vector> 
#include <iterator> 
#include <algorithm>  
using namespace std;

int main()
{
    vector<int> v = {1,2,3,4,6,4,5};
    // Get index of element from iterator
    int index = distance(v.begin(), find(v.begin(), v.end(), 4));
    cout << index;
}