C语言学习014:结构化数据类型

 1 #include <stdio.h>
 2 
 3 //定义数据结构
 4 struct fish{
 5     const char *name;
 6     const char *species;
 7     int teeth;
 8     int age;
 9 };
10 
11 void catalog(struct fish f){
12     printf("%s is a %s with %i teeth. He is %i\n",f.name,f.species,f.teeth,f.age);//访问结构的字段
13 }
14 
15 int main(){
16     //声明结构变量
17     struct fish snappy={"Snappy","Piranha",69,4};
18     catalog(snappy);
19     return 0;
20 }

    struct fish snappy={"Snappy","Piranha",69,4};
    struct fish gnasher=snappy;

 1 #include <stdio.h>
 2 
 3 struct preferences{
 4     const char *food;
 5     float exercise_hours;
 6 };
 7 
 8 struct fish{
 9     const char *name;
10     const char *species;
11     int teeth;
12     int age;
13     struct preferences care;//嵌套在fish中的结构体preferences
14 };
15 
16 void catalog(struct fish f){
17     printf("%s is a %s with %i teeth. He is %i\n",f.name,f.species,f.teeth,f.age);//访问结构的字段
18     //访问结构体中的结构体
19     printf("%s like to eat %s\n",f.name,f.care.food);
20     printf("%s like to exercise %f hours\n",f.name,f.care.exercise_hours);
21 }
22 
23 int main(){
24     struct fish snappy={"Snappy","Piranha",69,4,{"Meat",7.5}};
25     catalog(snappy);
26     return 0;
27 }

#include <stdio.h>

typedef struct cell_phone{
    int cell_no;
    const char *wallpapaer;
} phone;//phone为类型名（cell_phone的别名）

int main(){
     phone p={5555,"sinatra.png"};
     printf("number %i\n",p.cell_no);
    return 0;
}

1 typedef struct {
2     int cell_no;
3     const char *wallpapaer;
4 } phone;

 1 #include <stdio.h>
 2 
 3 typedef struct {
 4     int cell_no;
 5     const char *wallpapaer;
 6 } phone;
 7 
 8 int main(){
 9      phone p={5555,"sinatra.png"};
10      phone p2=p;
11      p2.cell_no=4444;
12      printf("p.cell_no:%i p2.cell_no:%i\n",p.cell_no,p2.cell_no);
13      phone* p3=&p;//将结构p的地址赋值给*p3
14      (*p3).cell_no=6666;
15      printf("p.cell_no:%i p2.cell_no:%i p3.cell_no:%i\n",p.cell_no,p2.cell_no,(*p3).cell_no);
16     return 0;
17 }

1 int main(){
2      phone p={5555,"sinatra.png"};
3      phone* p2=&p;
4      printf("p2->wallpapaer:%s = (*p2).wallpapaer:%s\n",p2->wallpapaer,(*p2).wallpapaer);//
5     return 0;
6 }