C语言typedef语法

1、定义新的类型名

#typedef int bool;
define true 1
define false 0

bool a = true
bool b = false

2、定义结构体简称

struct Node {
  int x;
};
struct Node n = {1};

typedef struct Node {
  int x;
} myNode;
myNode n = {1};

3、定义数组简称

#typedef int INT_ARR_100 [100];
#typedef char CHAR_ARR_100 [100];

INT_ARR_100 a = {1, 2, 3, 4};
printf("%d %d %d %d\n", a[0], a[1], a[2], a[3]);
CHAR_ARR_100 b = "test7890";
printf("%s\n", b);

4、定义指针简称

#typedef char * PCHAR;

PCHAR a = "test666";
printf("%s\n", a);

#include<stdio.h>
  
//定义新的类型名
typedef int bool;

//为自定义数据类型(结构体、共同体和枚举类型)定义简洁的名称
typedef struct Point {
        int x;
} myPoint;

//为数组定义简洁名称
typedef int INT_ARR_100 [100];
typedef char CHAR_ARR_100 [100];

//为指针定义简洁名称
typedef char * PCHAR;

int main(int argc, char *argv[])
{
        bool true=1,false=0;
        printf("%d %d\n", true, false);

        //使用全称
        struct Point p1;
        p1.x = 1;
        printf("%d\n", p1.x);

        //使用简称
        myPoint p2;
        p2.x = 2;
        printf("%d\n", p2.x);

        INT_ARR_100 arr = {1, 2, 3, 4};
        printf("%d %d %d %d\n", arr[0], arr[1], arr[2], arr[3]);
        CHAR_ARR_100 str = "abcdefg";
        printf("%s\n", str);

        PCHAR a = "test char*";
        printf("%s\n", a);

        return 0;
}