Priority queue for custom class

#1

why did we need to pass vector as a parameter to priority_queue declaration ??

we passed PersonCompare object how that can call one of its class function operator itself, we did not call operator( )

#2

Hi… can u share the code u are referring to

#3

it in heaps 16 lecture - Priority queue for custom class
i am having problems in the lecture so i did not code it

#4

that is what I am asking… what doubt u are having???

#5 
class PersonCompare{
public:
      bool operator ()(Person A, Person B)
      {
              return A.age >B.age ;
      }
};

priority_queue< Person, vector<Person>, PersonCompare > pq;

why did we need to pass vector<person> as a parameter in priority_queue declaration ??

we passed PersonCompare how that can call one of its class function operator itself as we did not call operator( )

and is it necessary to overload with () this operator to make a comparision

#6

it is just used for using comparator function… basically making the priority queue min heap…

#7

toh hum compare function kisi aur operator ko overload kr skte h ??

compare(int a, int b)
{
     return a>b;
}

aur mujhe ye kabhi smaj nii aya ki ye compare function agar as parameter pass ho kahi
toh yeh ascending order dega ya descending ???
ye fix h kya ??

#8

compare(int a, int b)
{
return a>b;
}
this will give descending order…

#9

agar as compare as parameter pass kr rhe toh hamesha descending dega ??

#10

compare(int a, int b)
{
return a<b;
}
yha a < b will give ascending order…

#11

han ascending dena chahiye
lekin jab print kra rhe h toh maxmimum wala pehle print ho rha h matlab desceding de rha h

#12

kha pe… code share kro…

#13

@Vaibhav277

#14

refer this https://ide.codingblocks.com/s/269164

#15

bhai m vahi toh puch rha hu
tumne iss siign pe ‘<’ ascending kaha tha
lekin ispe descending de rha h

#16

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