案例1： 

#include <stdio.h>
#include <string.h>
#include <malloc.h>typedef int zhangsan; //为int在多取一个名字   zhangsan等价于intstruct Student{int sid;char sname[100];char sex;} ST;int main() {int i = 10;  //等价于zhangsan i=10zhangsan j = 20;printf("%d", j);char c = '\0';printf("%c\n", c);printf("c输出得：%d\n", (int)c);struct Student st;struct Student * ps = &st;ST.sid=12;ST.sex = 'n';strcpy_s(ST.sname , "lisi");printf("%c\n", ST.sex);printf("%d\n", ST.sid);printf("%s\n", ST.sname);while (true){}return 0;
}

 

案例2：

#include <stdio.h>
#include <string.h>
#include <malloc.h>typedef int zhangsan; //为int在多取一个名字   zhangsan等价于inttypedef struct Student{int sid;char sname[100];char sex;} ST;int main() {int i = 10;  //等价于zhangsan i=10zhangsan j = 20;printf("%d", j);char a = '\0';printf("%c\n", a);struct Student st;struct Student * ps = &st;ST st2;         //等价于  struct Student st;st2.sid = 12;st2.sex = 'n';strcpy_s(st2.sname, "lisi");printf("%c\n", st2.sex);printf("%d\n", st2.sid);printf("%s\n", st2.sname);while (true) {}return 0;
}

 案例3：

#include <stdio.h>
#include <string.h>
#include <malloc.h>typedef int zhangsan; //为int在多取一个名字   zhangsan等价于inttypedef struct Student{int sid;char sname[100];char sex;} * PST;   //等价于struct Student * int main(void) {struct Student st;PST ps = &st;ps->sid = 99;printf("%d\n", ps->sid);while (true) {}return 0;
}

 

案例4：

#include <stdio.h>
#include <string.h>
#include <malloc.h>typedef int zhangsan; //为int在多取一个名字   zhangsan等价于inttypedef struct Student
{int sid;char sname[100];char sex;} *PSTU,STU;   //PSTU等价于struct Student * （PSTU表示结构体指针）,STU等价于struct Student st （结构体本身）int main(void) {STU st;PSTU ps = &st;ps->sid = 99;printf("%d\n", ps->sid);while (true) {}return 0;
}