C 语言结构体,结构体指针

  struct Student{
      int num;
      char name[20];
      char sex;
      int age;
      float score;
      char addr[30];
  };
  void demo()
  {
     struct Student s={1001,"lele",'M',20,98.5,"Shanghai"};
      struct Student sArr[3];
      int i;
      for (i=0;i<3;++i)
          scanf("%d%s %c%d%f%s",&sArr[i].num,sArr[i].name,&sArr[i].sex,&sArr[i].age,&sArr[i].score,sArr[i].addr);
      for (i=0;i<3;++i)
          printf("%d %s %c %d %5.2f %s\n",sArr[i].num,sArr[i].name,sArr[i].sex,sArr[i].age,sArr[i].score,sArr[i].addr);

  }
  typedef struct Teacher{
      int num;
      char name[20];
      float score;
  }student_t;

  void demo1()
  {
     student_t s={1001,"xiaozhao",96.5};
     student_t sArr[3]={1001,"wangwu",96.5,1005,"lilei",88.5,1007,"zhangsan",92.65};
      student_t *p;
      int num;

      p=sArr;
      num=p->num++;
      printf("num = %d,p->num= %d\n",num,p->num);
      num=++p->num;
      printf("num = %d,p->num= %d\n",num,p->num);
      num=p++->num;
      printf("num = %d,p->num= %d\n",num,p->num);
      //p=&s;
      //printf("%d %s %5.2f\n",p->num,p->name,p->score);
  }
  int main()
  {
      demo1();
      return 0;
  }