如何用C++结构体模拟面向对象 封装与数据抽象的简单实现

struct Person {
    char name[32];
    int age;
};

void set_age(Person* p, int age) {
    if (age >= 0 && age <= 150)
        p->age = age;
    else
        p->age = 0;
}

age

age

typedef struct Person Person;

Person* create_person(const char* name, int age);
void destroy_person(Person* p);
void print_person(const Person* p);

#include "person.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct Person {
    char name[64];
    int age;
};

Person* create_person(const char* name, int age) {
    Person* p = (Person*)malloc(sizeof(Person));
    strcpy(p->name, name);
    p->age = age;
    return p;
}

void destroy_person(Person* p) {
    free(p);
}

void print_person(const Person* p) {
    printf("Name: %s, Age: %d\n", p->name, p->age);
}

typedef struct {
    int x;
    int y;
    void (*move)(struct Point*, int dx, int dy);
} Point;

void point_move(Point* p, int dx, int dy) {
    p->x += dx;
    p->y += dy;
}

Point* create_point(int x, int y) {
    Point* p = (Point*)malloc(sizeof(Point));
    p->x = x;
    p->y = y;
    p->move = point_move;
    return p;
}

Point* p = create_point(10, 20);
p->move(p, 5, 5);  // 移动坐标