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I've been searching for a while now, but i can't find what algorithm does visual c++ use for the std::sort function, i know the GNU Standard C++ library uses Introsort, but there doesn't seem to be any sources saying which one Microsoft's visual c++ use!
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The std::sort is a sorting function that uses the Introsort algorithm and have the complexity of O(N log(N)) where N= std::distance(first, last) since C++11 and the order of equal elements is not guaranteed to be preserved[3]. The gcc-libstdc++ also uses Introsort algorithm.
Most implementations of std::sort use quicksort, (or usually a hybrid algorithm like introsort, which combines quicksort, heapsort and insertion sort).
std::sort() is a built-in function in C++'s Standard Template Library. The function takes in a beginning iterator, an ending iterator, and (by default) sorts the iterable in ascending order. The function can also be used for custom sorting by passing in a comparator function that returns a boolean.
The time complexity of Quicksort is O(n log n) in the best case, O(n log n) in the average case, and O(n^2) in the worst case. But because it has the best performance in the average case for most inputs, Quicksort is generally considered the “fastest” sorting algorithm.
How sort () Algorithm Function work in C++? The basic method by which the sorting algorithm works is based on comparison. The sorting function, attempts to compare each and every element of the list.
There is a builtin function in C++ STL by the name of sort (). This function internally uses IntroSort.
As expected, the output of the code is that the sorting has been done in two different formats using two methods. The sort function of C++ is used to sort a list of values. The sorting can be done in ascending or descending way. The sorting is basically done by comparing two values.
sort() takes a third parameter that is used to specify the order in which elements are to be sorted. We can pass “greater()” function to sort in descending order. This function does a comparison in a way that puts greater element before. // C++ program to demonstrate descending order sort using.
Use the source Luke :) its quicksort (MSVC 2013) or some times heap sort or even insertion sort (based on the size of the container)
template<class _RanIt,
class _Diff> inline
void _Sort(_RanIt _First, _RanIt _Last, _Diff _Ideal)
{ // order [_First, _Last), using operator<
_Diff _Count;
for (; _ISORT_MAX < (_Count = _Last - _First) && 0 < _Ideal; )
{ // divide and conquer by quicksort
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