用里面的结构类型初始化一个结构

Question

我想创建一个结构体 Person，它由两个结构体类型和一个变量组成。那么如何初始化和使用 struct Person 呢？

struct name{
   char *firstName;
   char *lastName;
} name;

struct address{
   char *street;
   int number;
} address;

struct person{
   struct name fullName;
   struct address fullAddress;
   int age;
} person;

Answer 1

您可以使用嵌套的{}。

struct person
{
   struct name fullName;
   struct address fullAddress;
   int age;
} person = 
{
    {
        "First Name", /* person.fullName.firstName */
        "Last Name",  /* person.fullName.lastName */
    },
    {
        "Street",     /* person.fullAddress.street */
        42            /* person.fullAddress.number */
    },
    42                /* person.age */
};

然后你可以访问其他成员如下：

person.fullName.firstName;
person.fullName.lastName;
person.fullAddress.street;
person.fullAddress.number;
person.age;

Answer 2

对于 18 岁的 John Doe，住在 42 岁的地址

struct person{
   struct name fullName;
   struct address fullAddress;
   int age;
} person = {{"John", "Doe"}, {"address", 42}, 18};