1.结构声明
struct date
{
int month;
int day;
int year;
};
2.结构对象声明
struct date today;
3.结构对象成员赋值
today.month = 5;
today.day = 1;
today.year = 2023;
4.结构成员使用
NSLog (@"今天是:%i/%i/%.2i.",
today.month,
today.day,
today.year % 100);