C / C++ / MFC

Write a program that calculates the following expression: total = (num3 + num4) - (num1 + num2) + 1

import std.core;
using namespace std;

class cBASE {};
struct cDERIVED : public cBASE
{
	template<typename T> requires is_base_of_v<cBASE, cDERIVED> // will not compile
	class someClass {};
	someClass<cDERIVED> someData;
	constexpr bool TEST_is_base_of() { return is_base_of_v<cBASE, cDERIVED>; } // will compile and return true
};

int main()
{
	cout << "Hello World\n";
	cout << boolalpha;

	cDERIVED _derived;
	cout << _derived.TEST_is_base_of();
}