Comparators passing clarification

#1

you used bool compare( int a,int b ) as a function but while passing in bubble_sort function use used it as

void bubble_sort(int a[ ], int n, bool(&cmp)(int a,int b)

how? why?

#2

@345avamanverma
This is the syntax for passing reference to a function to another function
We passed reference of compare function so that sort function can use the custom comparator

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