【Cherno的C++视频】References in C++

#include 

//it's a way for us to reference an existing varible.

#define LOG(x) std::cout << x << std::endl;

//void Increment(int* value)
//{
//	(*value)++;
//}

void Increment(int& value)//in this way, it's a lot of cleaner and simpler to read.
{
	value++;
}

int main(void)
{
	int a = 5;
	//int& ref = a;
	//ref = 2;
	//LOG(a);

	Increment(a);
	LOG(a);

	//int b = 8;
	//int& ref = a;
	//int& ref = b;//wrong!!!

	int b = 8;
	int* ref = &a;
	*ref = 2;//a = 2
	ref = &b;
	*ref = 1;//b = 1
	LOG(a);
	LOG(b);

	//int& ref;//wrong!!!

	std::cin.get();
}