问cpp中的析构函数是否自动调用？非动态变量是否被删除，即使析构函数没有提到它们？

EN

class B {
    int x;
}

class A {
    int x;
    int y;
    B* tab[10];
    A(int x, int y){
        this->x = x;
        this->y = y;
        for (int i = 0; i < 10; i++){
            tab[i] = new B;
        }            
    }
    ~A(){
        for (int i = 0; i < 10; i++){
            delete tab[i];
        }
    }
int main(){
    A a(10, 10);
    return 0;
}