c++继承另一命名空间的类

1.头文件

#include <iostream>

namespace A {
    class A {
    public:
        void run();
    };
}

namespace B {
    class B : public A::A {
    public:
        void save();
    };
}

2.cpp文件

#include <cstdio>
#include "test.h"

using namespace std;

void A::A::run()
{
    printf("A is running!\n");
}

void B::B::save()
{
    printf("B is saving!\n");
}

int main()
{
    A::A a;
    B::B b;

    a.run();
    b.run();
    b.save();

    return 0;
}

3.编译源码

$ g++ -o test test.cpp

4.运行及其结果

$ ./test
A is running!
A is running!
B is saving!