typedef的用法
#include<stdio.h>
typedef struct student
{
int a;
char name[100];
char sex;
}*PST, ST; // PST代表struct student * ST代表struct student
int main(void)
{
// struct student sy;
// struct student* pst = &sy;
ST st;
PST ps = &st;
ps->a = 99;
printf("a = %d\n\r",ps->a);
return 0;
}