thrust

◆ max_element() [1/4]

template<typename DerivedPolicy , typename ForwardIterator >
__host__ __device__ ForwardIterator thrust::max_element ( const thrust::detail::execution_policy_base< DerivedPolicy > &  exec,
ForwardIterator  first,
ForwardIterator  last 
)

max_element finds the largest element in the range [first, last). It returns the first iterator i in [first, last) such that no other iterator in [first, last) points to a value larger than *i. The return value is last if and only if [first, last) is an empty range.

The two versions of max_element differ in how they define whether one element is greater than another. This version compares objects using operator<. Specifically, this version of max_element returns the first iterator i in [first, last) such that, for every iterator j in [first, last), *i < *j is false.

The algorithm's execution is parallelized as determined by exec.

Parameters
execThe execution policy to use for parallelization.
firstThe beginning of the sequence.
lastThe end of the sequence.
Returns
An iterator pointing to the largest element of the range [first, last), if it is not an empty range; last, otherwise.
Template Parameters
AThrust backend system.
ForwardIteratoris a model of Forward Iterator, and ForwardIterator's value_type is a model of LessThan Comparable.
#include <thrust/extrema.h>
...
int data[6] = {1, 0, 2, 2, 1, 3};
int *result = thrust::max_element(thrust::host, data, data + 6);
// *result == 3
See also
http://www.sgi.com/tech/stl/max_element.html