<分区>
前几天我学到了一些关于 C++ 的新知识;以下不起作用:
class ParentClass {
public:
void someFunction() { printf("ParentClass::someFunction()"); }
};
class ChildClass : public ParentClass {
public:
void someFunction(int a) { printf("ChildClass::someFunction(int)"); }
};
int main() {
ChildClass childClass;
// This call is a compiler error.
// I would expect it to call ParentClass::someFunction()
childClass.someFunction();
}
然而,在 Java(以及其他语言)中做完全相同的事情正如我所期望的那样:
public class ParentClass {
public void someFunction() { System.out.println("ParentClass"); }
}
public class ChildClass extends ParentClass {
public void someFunction(int a) { System.out.println("ChildClass"); }
}
public class Main {
public static void main(String[] args) {
ChildClass childClass = new ChildClass();
// The following prints "ParentClass"
childClass.someFunction();
}
}
那么在 C++ 中给出了什么?为什么这会隐藏名称而不是重载它?