C++ 子类调用父类的方法，静态方法的调用

#include <iostream>
 
class  A
{
public:
 A();
~ A();
virtualvoid say()
{
std::cout << "Hello this is  class A!\n";
}
static void test()
{
std::cout << "Hello this is  class A  test function..!\n";
}
private:
 
};
 
 A:: A()
{
}
 
 A::~ A()
{
}
 
 class  B: public A
 {
 public:
  B();
 ~ B();
  void say()
 {
  A::say();
 std::cout << "Hello this is  class B..!\n";
 }
 private:
 
 };
 
  B:: B()
 {
 }
 
  B::~ B()
 {
 }
 
 
int main()
{
A::test();
B b;
b.say();
    std::cout << "Hello World!\n";
}

输出的结果：

#include <iostream>
class  A{public: A();~ A();virtualvoid say(){std::cout << "Hello this is  class A!\n";}static void test(){std::cout << "Hello this is  class A  test function..!\n";}private:
};
 A:: A(){}
 A::~ A(){}
 class  B: public A { public:  B(); ~ B();  void say() {  A::say(); std::cout << "Hello this is  class B..!\n"; } private:
 };
  B:: B() { }
  B::~ B() { }

int main(){A::test();B b;b.say();    std::cout << "Hello World!\n";}