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C++ compilation error

sturk (72)
Can someone explain to me why are the codes below not compilable? I don't understand. Thanks. Revising for a test.

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Given the following code:
class A {
   int& z;
public:
   A(int z = 0) 
   {
      this->z = z;
   }
};

int main(void) {
  A a();
  return 0;
}
What is the result of compilation?   Success ✘   Warning    Undefined    Error
Last edited on
coder777 (8444)
It will be a compiler error. A reference needs to be associate with an object at initialization time.
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