浅析c与c++中struct的区别

        struct Point
        {
                int x; // 合法
                int y; // 合法
                void print()
                {
                        printf("Point print\n"); //编译错误
                };
}9        ;

       #include <iostream>
        using namespace std;
        class CPoint
        {
                int x;                  //默认为private
                int y;                  //默认为private
                void print()             //默认为private
                {
                        cout << "CPoint: (" << x << ", " << y << ")" << endl;
                }
        public:
                CPoint(int x, int y)      //构造函数，指定为public
                {
                        this->x = x;
                        this->y = y;
                }
                void print1() //public
                {
                        cout << "CPoint: (" << x << ", " << y << ")" << endl;
                }
        };

        struct SPoint
        {
                int x;              //默认为public
                int y;              //默认为public
                void print()         //默认为public
                {
                        cout << "SPoint: (" << x << ", " << y << ")" << endl;
                }
                SPoint(int x, int y)  //构造函数,默认为public
                {
                        this->x = x;
                        this->y = y;
                }
        private:
                void print1()      //private类型的成员函数
                {
                        cout << "SPoint: (" << x << ", " << y << ")" << endl;
                }
        };

        int main(void)
        {
                CPoint cpt(1, 2);  //调用CPoint带参数的构造函数
                SPoint spt(3, 4);  //调用SPoint带参数的构造函数

                cout << cpt.x << " " << cpt.y << endl;  //编译错误
                cpt.print();       //编译错误
                cpt.print1();      //合法

                spt.print();      //合法
                spt.print1();     //编译错误
                cout << spt.x << " " << spt.y << endl;  //合法

                return 0;
        }

       #include <iostream>
        using namespace std;
        class CBase
        {
        public:
                void print()                //public成员函数
                {
                        cout << "CBase: print()..." << endl;
                }
        };
        class CDerived1 : CBase        //默认private继承
        {
        };

        class CDerived2 : public Cbase   //指定public继承
        {
        };

        struct SDerived1 : Cbase        //默认public继承
        {
        };

        struct SDerived2 : private Cbase  //指定public继承
        {
        };

        int main()
        {
                CDerived1 cd1;
                CDerived2 cd2;
                SDerived1 sd1;
                SDerived2 sd2;

                cd1.print();    //编译错误
                cd2.print();
                sd1.print();
                sd2.print();    //编译错误

                return 0;
        }