auto_test1.cpp

#include <iostream>

class A {
public:
	A(int i) : a(i) {}
	int a;
	int& GetA() { return a; }
};

int main(int argc, const char * argv[]) {
	A theA(10);
	
	auto test = theA.GetA();
	test = 20;
	std::cout << "a: " << theA.a << std::endl;
	
    return 0;
}