Priority Queue STL 02 | Comparator Class

#1

  1. Didn’t understand declaration of priority queue, which is

    priority_queue<person,vector,personCmp> pq;

    on line no 40 in the video.

5d926f14-97ec-4eed-9df2-d20d8f566263.png1093×553

selected line here in my code

  1. Also didn’t understand personCmp class.
#2

hi @saniyaainamdar,
first - here a priority queue is made of type vector, when u dont make it with primitive data type then it is defined like this only.

second - as it is not primitive data type like int, float
say compiler understand how to compare 10 and 20 but what about person who has attributes {name,age} how does compiler decides to compare so u name a personCmp class here u say compare on these attributes

u can read https://www.geeksforgeeks.org/stl-priority-queue-for-structure-or-class/
for more

#3

Got it. Thank You…!!

#4

@saniyaainamdar, please mark as resolved

#5

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