std::partial_sum
From Cppreference
| Defined in header
<numeric> | ||
| template< class InputIterator, class OutputIterator >
OutputIterator partial_sum( InputIterator first, InputIterator last, OutputIterator d_first ); | (1) | |
| template< class InputIterator, class T, class BinaryOperation >
OutputIterator partial_sum( InputIterator first, InputIterator last, OutputIterator d_first, | (2) | |
Computes the partial sums of the elements in the subranges of the range [first, last) and writes them to the range beginning at d_first. Each The first version uses operator+ to sum up the elements, the second version uses the given binary function op.
Equivalent operation:
*(d_first) = *first; *(d_first+1) = *first + *(first+1); *(d_first+2) = *first + *(first+1) + *(first+2); *(d_first+3) = *first + *(first+1) + *(first+2) + *(first+3); ...
Contents |
Parameters
| first, last | - | the range of elements to sum | |||||||||
| d_first | - | the beginning of the destination range | |||||||||
| op | - | binary operation function object that will be applied. The signature of the function should be equivalent to the following:
The signature does not need to have const &. | |||||||||
Return value
Iterator to the element past the last element written.
Equivalent function
| This section is incomplete |
Example
| This section is incomplete |
See also
| computes the differences between adjacent elements in a range (function template) | |
| sums up a range of elements (function template) | |
