[C语言 - 7] 结构体struct

1     struct Student
2     {
3         int age;
4         char *name;
5         float height;
6     };

1     //define a struct variable
2     struct Student stu = {27, "simon", 1.65f};

1     struct Student {
2         int age;
3         char *name;
4         float height;
5     } stu = {25, "simon", 1.65f};

1     /*错误写法
2     struct Student p;
3     p = {17, "Tom"};
4      */

1     struct Student p;
2     p.age = 17;
3     p.name = "Tom”;

1     struct Student p2 = {17, "Sam”};

1     struct Student p3 = {.name="Judy", .age= 44};

1     struct
2     {
3         int age;
4         char *name;
5     } stu3;

 1 void test1()
 2 {
 3     struct Date
 4     {
 5         int year;
 6         int month;
 7         int day;
 8     };
 9    
10     struct Student
11     {
12         int age;
13         struct Date birthday;
14     };
15    
16     struct Student stu = {25, {1989, 8, 10}};
17    
18     printf("my birthday ==> %d-%d-%d\n", stu.birthday.year, stu.birthday.month, stu.birthday.day);
19 }

1     struct Student
2     {
3         int age;
4         char *name;
5         float height;
6     } stus[5];

1     struct
2     {
3         int age;
4         char *name;
5         float height;
6     } stus[5];

 1 void test4()
 2 {
 3     struct Person p = {33, "ss"};
 4     struct Person *pointer;
 5    
 6     pointer = &p;
 7    
 8     printf("test4: person‘s age = %d\n", p.age);//It‘s p!!!, not pointer!!
 9     printf("test4: person‘s age = %d\n", (*pointer).age);
10     printf("test4: person‘s age = %d\n", pointer->age);
11 }

1     struct Student p2 = {17, "Sam"};
2     struct Student p3 = {.name="Judy", .age= 44};
3     p3 = p2;
4     printf("p3: age->%d, name-.%s\n", p3.age, p3.name);