Reducing a multiple arguments function with currying

Currying is a technique to split a function that takes multiple arguments into evaluating a sequence of functions, each with a single argument. In other words, we create other functions based on a current function by reducing the current function. Let's suppose we have a function named areaOfRectangle(), which takes two parameters, length and width. The code will be like this:

    /* curry_1.cpp */

    #include <functional>
    #include <iostream>

    using namespace std;

    // Variadic template for currying
    template<typename Func, typename... Args>
    auto curry(Func func, Args... args)
    {
      return [=](auto... lastParam)
      {
        return func(args..., lastParam...);
      };
    }

    int areaOfRectangle(int length, int width)
    {
      return length * width;
    }

    auto main() -> int
    {
      cout << "[curry_1.cpp]" << endl;

      // Currying the areaOfRectangle() function...