枚举

枚举只能是 int
枚举量可以指定量

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enmu color{
  red,
  yellow,
  blue,
  green,
};

结构

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struct date{
  int year;
  int month;
  int day;
};

//初始化
struct date today;
today.year = 2019;
today.month = 8;
today.day = 23;

//初始化
struct date today = {2019, 8, 23};

//初始化
struct date t_day = {.month = 8, .year = 2019};
  • 无名结构
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//(date) 可选
struct (date){
  int year;
  int month;
  int day;
}today,yesterday;
*结构参数是值的传递*

结构指针

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(*p).month = 12;
p->month = 12;

结构数组

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struct time{
  int hour;
  int minutes;
  int seconds;
};
struct time times[] = {
  {12,20,25},{16,24,45}
};

结构的嵌套

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struct date{
  int year;
  int month;
  int day;
};
struct time{
  int hour;
  int minutes;
  int seconds;
};
struct DayAndTime{
  struct date today;
  struct time currtime;
};
struct DayAndTime dayAndtimes[] = {
  {{2019,8,25},{16,24,45}},
  {{2019,8,23},{13,14,35}}
};

typedef

声明一个已经有的数据类型的新名字

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typedef long int64_t;
typedef struct time{
  int hour;
  int minutes;
  int seconds;
} CurrTime;

int64_t i = 1000000000000;
CurrTime t = {12,35,24};

联合

成员使用同一个内存空间

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typedef union{
  int i;
  char ch[sizeof(int)];
} CHI;

ACLLib 图形库

Win32API的函数库，开发Windows程序

ACLLib