Answers for "what sorting algorithm does sort function in c++ use"

sort c++

#include <algorithm>    // std::sort

int myints[] = {32,71,12,45,26,80,53,33};
// using default comparison (operator <):
std::sort (myvector.begin(), myvector.begin()+4);           //(12 32 45 71)26 80 53 33

// fun returns some form of a<b
std::sort (myvector.begin()+4, myvector.end(), myfunction); // 12 32 45 71(26 33 53 80)