如何在C中从结构内部分配内存？

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

typedef struct {
    char *name;
    int age;
} Person;

// 创建一个新的Person对象并为其name字段分配内存
Person* create_person(const char *name, int age) {
    Person *p = (Person*)malloc(sizeof(Person));
    if (p == NULL) {
        fprintf(stderr, "Memory allocation failed\n");
        exit(1);
    }
    p->name = (char*)malloc(strlen(name) + 1);
    if (p->name == NULL) {
        fprintf(stderr, "Memory allocation failed for name\n");
        free(p); // 释放之前分配的结构体内存
        exit(1);
    }
    strcpy(p->name, name);
    p->age = age;
    return p;
}

// 释放Person对象占用的内存
void free_person(Person *p) {
    if (p != NULL) {
        free(p->name);
        free(p);
    }
}

int main() {
    Person *person = create_person("Alice", 30);
    printf("Name: %s, Age: %d\n", person->name, person->age);
    free_person(person);
    return 0;
}