#include<stdio.h>

//结构体类型的定义

// struct student

// {

	// char name[20];

	// int  age;

// };

//定义一个结构体类型，这个类型有2个名

typedef struct student

{

	char name[20];

	int  age;

} student;

//第一个结构体类型 struct teacher, teacher;

//第二个结构体指针类型struct teacher *,pTeacher;

typedef struct teacher1

{

	char name[20];

	int age;

	int mager;

}teacher, *pTeacher;

int main(void)

{

	student  St1,St2;

	teacher  Tc1,Tc2;

	pTeacher  Tc3,Tc4;

	Tc1.age = 11;

	Tc3 = &Tc1;

	St1.age = 12;

	printf("%d\n",Tc3->age);

}

#include<stdio.h>

typedef int *PINT;

typedef const int *CPINT;

//const int *p 和 int *const p是不同的。前者是p指向的变量是const，后者是p本身const

int main(void)

{

    int a = , b = , c = ;

    PINT p1 = &a;

    const PINT p2 = &a;

    CPINT p3 = &c;

    printf("*p1 = %d\n",*p1);

    printf("*p2 = %d\n",*p2);

    *p2 = ;

    printf("*p2 = %d\n",*p2);

    //*p3 = 88;        //此语句出错，

     p3 = &b;

    printf("*p3 = %d\n",*p3);

    // PINT p2 = &b;   //此语句出错

    // printf("*p2 = %d\n",*p2);

}

/*

   typedef int *PINT; const PINT p2;相当于int *const p2;

   typedef int *PINT; PINT const p2;相当于int *const p2;

   如果确实想得到const int *p;这种效果，只能typedef const int *CPINT;CPINT p1;

*/