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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_functional_greater.htm below:

C++ Greater Function

It is a function object class for greater-than inequality comparison and binary function object class whose call returns whether the its first argument compares greater than the second (as returned by operator >).

Following is the declaration for std::greater.

template <class T> struct greater;

template <class T> struct greater;

T − It is a type of the arguments and return type of the functional call.

none

noexcep − It doesn't throw any exceptions.

In below example explains about std::greater.

#include <iostream>
#include <functional>
#include <algorithm>

int main () {
   int numbers[]={200,40,50,100,30};
   std::sort (numbers, numbers+5, std::greater<int>());
   for (int i=0; i<5; i++)
      std::cout << numbers[i] << ' ';
   std::cout << '\n';
   return 0;
}

Let us compile and run the above program, this will produce the following result −

200 100 50 40 30  

functional.htm

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