如何正确返回对类成员的引用？

class MyClass {
public:
    int myVar;
};

MyClass obj;

int& getMyVar(MyClass& obj) {
    return obj.myVar;
}

int* getMyVarPtr(MyClass& obj) {
    return &obj.myVar;
}

int& myVarRef = getMyVar(obj);
myVarRef = 42;

int* myVarPtr = getMyVarPtr(obj);
*myVarPtr = 42;