Function main

base_code/struct_function.cpp:58–70

//void B() {}  //error! 符号 "B" 已经被定义为一个 "struct Base1" 的别名

int main() {
//    Base base{};  // error
    struct Base base{};
    base.v1=1;
//    base.v3=2;    // error
    Base::print();
    printf("%d\n",base.v1);
//    printf("%d\n",base.v3);   // error
    Base *b = new Derived();
    b->print(); // todo：Base::print() 和 class 有点不一样
    delete b;
    return 0;
}