# Algorithm (C++)

In the C++ Standard Library, algorithms are components that perform algorithmic operations on containers and other sequences.[1]

The C++ standard provides some standard algorithms collected in the `<algorithm>` standard header.[2] A handful of algorithms are also in the `<numeric>` header. All algorithms are in the std namespace.

## Categories of algorithms

The algorithms in the C++ Standard Library can be organized into the following categories.

• Non-modifying sequence operations (e.g. find_if, count, search)
• Modifying sequence operations (e.g. replace, remove, reverse)
• Sorting (e.g. `sort`, stable_sort, partial_sort)
• Binary search (e.g. lower_bound, upper_bound)
• Heap (e.g. make_heap, push_heap)
• Min/max (e.g. min, max)

## Examples

• OutputIterator copy(InputIterator source_begin, InputIterator source_end, OutputIterator destination_begin)
• void fill(ForwardIterator destination_begin, ForwardIterator destination_end, T value)
• InputIterator find(InputIterator begin, InputIterator end, T search_object) (returns an iterator the found object or end, if the object isn't found)
• const T& max(const T& a, const T& b) returns the greater of the two arguments
• ForwardIterator max_element(ForwardIterator begin, ForwardIterator end) finds the maximum element of a range
• const T& min(const T& a, const T& b) returns the smaller of the two arguments
• ForwardIterator min_element(ForwardIterator begin, ForwardIterator end) finds the minimum element of a range

## References

1. ^ ISO/IEC (2003). ISO/IEC 14882:2003(E): Programming Languages - C++ §25 Algorithms library [lib.algorithms] para. 1
2. ^ Stroustrup, Bjarne (2009). Programming : principles and practice using C++. Upper Saddle River, NJ: Addison-Wesley. p. 729. ISBN 9780321543721. Retrieved 22 March 2012. The standard library algorithms are found in `<algorithm>`.