请问客户服务的真正含义是什么？

有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base() { x=0; } int x; }; class Derivedl: virtual public Base { public: Derived1() { x=10; } }; class Derived2: virtual public Base { public: Derived2() { x=20; } }; class Derived: public Derived1,protected Derived2 { }; int main() { Derived obj; cout＜＜obj.x＜＜endl; return 0; 该程序运行后的输出结果是 【14】 。