C:读取struct指针的属性会导致属性改变吗？

struct Person {
    char name[20];
    int age;
};

int main() {
    struct Person p;
    struct Person *ptr = &p;
    
    strcpy(ptr->name, "John");  // 通过指针访问结构体的属性
    ptr->age = 25;
    
    printf("Name: %s\n", ptr->name);  // 输出：Name: John
    printf("Age: %d\n", ptr->age);    // 输出：Age: 25
    
    return 0;
}