Class A public A(int m=o)X=m; 1 static void f(a a) Private int x void A f(aa) Cout<<x;∥付X的引用是错误的 cout<<ax;∥l确6 Class A {public: A(int m=0) {x=m;} static void f(A a); Private: int x; }; void A::f(A a) { Cout <<x; //对X的引用是错误的 cout<<a.x; //正确 }