C++里，基类的静态变量子类能共享吗，为了验证这个问题这里写了一段代码进行测试：

#include <iostream>class Base {
public:static int staticVariable;
};class Derived : public Base {
};int Base::staticVariable = 10;int main() {Base::staticVariable = 20;std::cout << "Base::staticVariable: " << Base::staticVariable << std::endl;std::cout << "Derived::staticVariable: " << Derived::staticVariable << std::endl;Derived::staticVariable = 30;std::cout << "Base::staticVariable: " << Base::staticVariable << std::endl;std::cout << "Derived::staticVariable: " << Derived::staticVariable << std::endl;return 0;
}

在这个代码中，定义了一个基类 Base，其中有一个静态变量 staticVariable。然后定义了一个子类 Derived，它继承了 Base。在 main 函数中，我们分别修改静态变量的值并访问 Base::staticVariable 和 Derived::staticVariable。

输出结果如下：

Base::staticVariable: 20
Derived::staticVariable: 20
Base::staticVariable: 30
Derived::staticVariable: 30

可以看到，修改了 Base::staticVariable 或 Derived::staticVariable 的值，它们仍然是相互影响，所以基类和子类的静态变量是共享的。