Finding the position of the max element

Question

Is there a standard function that returns the position(not value) of the max element of an array of values?

For example:

Suppose I have an array like this:

Answer 1

You can use max_element() function to find the position of the max element.

int main()
{
    int num, arr[10];
    int x, y, a, b;

    cin >> num;

    for (int i = 0; i < num; i++)
    {
        cin >> arr[i];
    }

    cout << "Max element Index: " << max_element(arr, arr + num) - arr;

    return 0;
}

Answer 2

std::max_element takes two iterators delimiting a sequence and returns an iterator pointing to the maximal element in that sequence. You can additionally pass a predicate to the function that defines the ordering of elements.

Answer 3

In the STL, std::max_element provides the iterator (which can be used to get index with std::distance, if you really want it).

int main(int argc, char** argv) {
  int A[4] = {0, 2, 3, 1};
  const int N = sizeof(A) / sizeof(int);

  cout << "Index of max element: "
       << distance(A, max_element(A, A + N))
       << endl;

  return 0;
}

Answer 4

STL has a max_elements function. Here is an example: http://www.cplusplus.com/reference/algorithm/max_element/

Answer 5

Or, written in one line:

std::cout << std::distance(sampleArray.begin(),std::max_element(sampleArray.begin(), sampleArray.end()));