Numeric

The numeric algorithms std::accumulate, std::adjacent_difference, std::partial_sum, std::inner_product and std::iota and the six additional C++17 algorithms std::exclusive_scan, std::inclusive_scan, std::transform_exclusive_scan, std::transform_inclusive_scan, std::reduce, and std::transform_reduce are special. All of them are defined in the header <numeric>. They are widely applicable, because they can be configured with a callable.

Accumulates the elements of the range. init is the start value:

T accumulate(InpIt first, InpIt last, T init)
T accumulate(InpIt first, InpIt last, T init, BiFun fun)

Calculates the difference between adjacent elements of the range and stores the result in result:

OutIt adjacent_difference(InpIt first, InpIt last, OutIt result)
FwdIt2 adjacent_difference(ExePol pol, FwdIt first, FwdIt last, FwdIt2 result)

OutIt adjacent_difference(InpIt first, InpIt last, OutIt result, BiFun fun)
FwdIt2 adjacent_difference(ExePol pol, FwdIt first...