The C++ Priority_queue is a container adaptor from the STL that provides the dynamic priority queue data structure. It is implemented as a binary heap, allowing efficient insertion, removal and access to the highest or lowest priority elements. By default, it orders elements in descending order based on a comparator function.Priority queues are commonly used in algorithms like Dijkstra's shortest path and Prim's minimum spanning tree.
SyntaxBelow is the syntax of std::priority_queue.
template <class T, class Container = vector<T>, class Compare = less<typename Container::value_type> < class priority_queue;Parameters
T − Type of the element contained.
T may be substituted by any other data type including user-defined type.
Container − Type of the underlying container object.
Compare − Comparison object to be used to order the priority_queue.
This may be a function pointer or function object that can compare its two arguments.
Following member types can be used as parameters or return type by member functions.
Sr.No. Member types Definition 1 value_type T (First parameter of the template) 2 container_type Second parameter of the template 3 size_type size_t 4 reference value_type& 5 const_reference const value_type& 6 difference_type ptrdiff_t Functions from <priority_queue>Below is list of all methods from <priority_queue> .
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