是否有一些等效的库或函数可以为我提供像next_permutation这样的一组值的下一个组合？
解决方法
组合：来自Mark Nelson关于同一主题的文章,我们有next_combination
http://marknelson.us/2002/03/01/next-permutation
排列：从STL我们有std :: next_permutation
排列：从STL我们有std :: next_permutation
template <typename Iterator>
inline bool next_combination(const Iterator first,Iterator k,const Iterator last)
{
if ((first == last) || (first == k) || (last == k))
return false;
Iterator itr1 = first;
Iterator itr2 = last;
++itr1;
if (last == itr1)
return false;
itr1 = last;
--itr1;
itr1 = k;
--itr2;
while (first != itr1)
{
if (*--itr1 < *itr2)
{
Iterator j = k;
while (!(*itr1 < *j)) ++j;
std::iter_swap(itr1,j);
++itr1;
++j;
itr2 = k;
std::rotate(itr1,j,last);
while (last != j)
{
++j;
++itr2;
}
std::rotate(k,itr2,last);
return true;
}
}
std::rotate(first,k,last);
return false;
}
