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Showing content from https://cplusplus.com/reference/functional/divides/ below:

class template

<functional>

std::divides 
template <class T> struct divides;

Division function object class

Binary function object class whose call returns the result of dividing its first argument by the second (as returned by operator /).

Generically, function objects are instances of a class with member function operator() defined. This member function allows the object to be used with the same syntax as a function call.

It is defined with the same behavior as:

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template <class T> struct divides : binary_function <T,T,T> {
  T operator() (const T& x, const T& y) const {return x/y;}
};
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template <class T> struct divides {
  T operator() (const T& x, const T& y) const {return x/y;}
  typedef T first_argument_type;
  typedef T second_argument_type;
  typedef T result_type;
};


Objects of this class can be used on standard algorithms such as transform or accumulate.

Template parameters
T
Type of the arguments and return type of the functional call.
The type shall support the operation (operator/).

Member types member type definition notes first_argument_type T Type of the first argument in member operator() second_argument_type T Type of the second argument in member operator() result_type T Type returned by member operator()
Member functions
T operator() (const T& x, const T& y)
Member function returning the division of its arguments (x/y).

Example 
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// divides example
#include <iostream>     // std::cout
#include <functional>   // std::divides
#include <algorithm>    // std::transform

int main () {
  int first[]={10,40,90,40,10};
  int second[]={1,2,3,4,5};
  int results[5];
  std::transform (first, first+5, second, results, std::divides<int>());
  for (int i=0; i<5; i++)
    std::cout << results[i] << ' ';
  std::cout << '\n';
  return 0;
}

Output:


See also
plus
Addition function object class (class template)
minus
Subtraction function object class (class template)
multiplies
Multiplication function object class (class template)
modulus
Modulus function object class (class template)
negate
Negative function object class (class template)
equal_to
Function object class for equality comparison (class template)

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