Comparators is not working

#1

#include
#include
using namespace std;
bool compare(int a,int b)
{
return a>b;
}
void sort_stl(int a[],int n,compare)
{
sort(a,a+n);
}
int main()
{
int n;
cout<<“Enter the number of elements you want to sort”<<endl;
cin>>n;
int a[n];
cout<<“Enter the elements”<<endl;
for (int b=0;b<n;b++)
{
cin>>a[b];
}
sort_stl(a,n,compare);
cout<<“The sorted array is”<<endl;
for(int c=0;c<n;c++)
{

    cout<<a[c]<<endl;
}

return 0;

}

This is showing error in compiler.
can you please tell the error in this.

#2

@juyal.sid
here you are passing compare function as a parameter to sort_stl() function, but whiling defining the sort_stl function you haven’t defined the parameter for compare correctly, you just wrote compare it doesn’t mean anything.
there is proper syntax for doing that.
i have done that for you, you can have a look at this code https://ide.codingblocks.com/s/254801
Also from the next time please share your code link after saving it as ide.codingblocks.com

#3

@juyal.sid
for better understanding read this,

Declaration

A prototype for a function which takes a function parameter looks like the following:

void func ( void (*f)(int) );

This states that the parameter f will be a pointer to a function which has a void return type and which takes a single int parameter. The following function ( print ) is an example of a function which could be passed to func as a parameter because it is the proper type:

void print ( int x ) {
  printf("%d\n", x);
}

Function Call

func(print);
#4

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