c 构造与成员属性结构 结构与函数 指向结构的指针

c 结构与成员属性结构 结构与函数 指向结构的指针

下面是我在表弟的例子上改的

#include <stdio.h>
#include <string.h>

struct class
{
	int classId;
	int count;

};

struct birth
{
	int year;
	int month;
	int day;
};
struct student
{
	int num;
	char name[20];
	int age;
	struct birth birthday;
};

struct student getStudentInfo();

int main() 

{ 
	struct class cl1 ,  *cl;
        cl = &cl1;
        cl1.classId = 3;
        cl1.count = 4;
        
        printf("%d\n%d\n",(*cl).classId,(*cl).count);

                printf("%d\n%d\n",cl->classId,cl->count);
         
	struct student stu =   getStudentInfo();
	printf("==============>%d\n%s\n%d\n%d %d %d\n",stu.num,stu.name,stu.age,stu.birthday.year,stu.birthday.month,stu.birthday.day);
} 

struct student getStudentInfo()
{
	struct student stu;
		stu.num=1001;
		strcpy(stu.name ,"Jin");
		stu.age=20;
		stu.birthday.year=1992;
		stu.birthday.month=10;
		stu.birthday.day=30;
	return stu;

}

输出：

jianguo@jianguo:/work/study$ sudo cc 727.c -o 727
jianguo@jianguo:/work/study$ ./727
3
4
3
4
==============>1001
Jin
20
1992 10 30
jianguo@jianguo:/work/study$