[C++] 이름 은폐 (name hiding)

이름 은폐 (name hiding)

• 예제 1

void f(int x){
    cout << "f(int x) --> " << x << endl;
}
void f(double x){
    cout << "f(double x) --> " << x << endl;
}
int main(){
    f(10);
    f(20.0);
}

 

• 출력

f(int x) --> 10
f(double x) --> 20

 

 

• 예제 2

void f(int x){
    cout << "f(int x) --> " << x << endl;
}
void f(const char* x){
    cout << "f(const char* x) --> " << x << endl;
}
int main(){
    void f(int x);
    f(10); //void f(int x);
    f("abc"); //에러
    ::f("abc"); //void f(const char* x)
}

 

• 예제 3

class A {
public:
    void f(int x) { cout << "A::f() --> " << x << endl; }
};
class B : public A {
public:
    void f(double x) { cout << "B::f() --> " << x << endl; }
};
int main(){
    B objB;
    objB.f(10.0);
    objB.f(20);
}

 

• 출력

B::f() --> 10
B::f() --> 20