Find maximum element from a vector for a given range

Question

I have tried to use the max function but it needs a iterator and that are A.begin and A.end but for my program I want to find for a range say from i to x .I tried to read the docs but was unable to find the solution. Any help would be appreciated.Thank you.

vector provides random access iterators so you can easily convert index to iterator items.begin() + i — user7860670
– user7860670, Commented Jul 20, 2017 at 9:20
That's the good thing about all the standard algorithm functions, they take a range. Iterators doesn't have to be just the beginning and end, it can be anything in between. — Some programmer dude
– Some programmer dude, Commented Jul 20, 2017 at 9:21
Possible duplicate of Can I increment an iterator by just adding a number? — Andre Kampling
– Andre Kampling, Commented Jul 20, 2017 at 9:22

The Quantum Physicist · Accepted Answer · 2017-07-20 09:30:15Z

You're not looking for max. But for std::max_element.

To use it:

std::vector<int> v; // fill it auto max_it = std::max_element(v.begin()+i, v.end());

And to check in the range [i,j):

auto max_it = std::max_element(v.begin()+i, v.begin()+j);

max_it here is an iterator, to get the number from it:

int max_number = *max_it;

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