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C语言和设计模式（继承、封装、多态）

　　

#include
         
          //多态typedef struct Human {    int age;    void(*say)(void);}Human;Human newHuman() {    Human human;    human.age = 1;    return human;}typedef struct Student {    Human human;    }Student;void studentSay(void) {    printf("studentSay\n");}Student newStudent() {    Student s;    s.human = newHuman();    s.human.say = studentSay;    return s;}typedef struct Teacher {    Human human;    }Teacher;void teacherSay(void) {    printf("teacherSay\n");}Teacher newTeacher() {    Teacher t;    t.human = newHuman();    t.human.say = teacherSay;    return t;}void function(Human human) {    human.say();    printf("age is:%d\n",human.age);}int main() {    Teacher t = newTeacher();    Student s = newStudent();    t.human.age = 12;    s.human.age = 33;        function(s.human);    function(t.human);        return 1;}