c语言结构体和联合体例题
第一题：要求你设计一个能够保存图书信息的结构。图书属性包括：书名（title）、作者（author）和单价信息（
price），并按照下面要求完成对于各种图书的相关操作。
/*
struct books {
char title[100];
char author[20];
double price;
} doyle = { "My life as a budgie", "Mack Tom", 14.6 };
int main(void) {
struct books dicken = { "Thinking in C++", "Stephen Prata", 78 };
struct books panshin = { .title = "C++ Primer", .author = "Stanley Lippman",
.price = 92.5 };
printf("The title is :%s\nThe author is :%s\nThe price is :%lf\n",
doyle.title, doyle.author, doyle.price);
printf("\n");
printf("The title is :%s\nThe author is :%s\nThe price is :%lf\n",
dicken.title, dicken.author, dicken.price);
printf("\n");
printf("The title is :%s\nThe author is :%s\nThe price is :%lf\n",
panshin.title, panshin.author, panshin.price);
printf("\n");
printf("“Thinking in C++”这本书的价格调整后为：\n");
printf("\n");
printf("The title is :%s\nThe author is :%s\nThe price is :%lf\n",
dicken.title, dicken.author, dicken.price = 85);
return EXIT_SUCCESS;
}
*/
第二题：
为上面的关于图书的程序，添加三个函数：
/*(1)编写显示图书信息函数show()。参数为结构的指针。显示图书信息的结构如下：
The title is :My life as a budgie
The author is :Mack Tom
The price is :14.6
#include <stdio.h>
#include <stdlib.h>
struct Library {
const char title[20];
const char author[10];
double price;
} panshin;
void show(struct Library *doy) {
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",doy->title,
doy->author, doy->price);
}
int main(void) {
struct Library doyle = { "My life as a budgie", "Mack Tom", 14.6 };
show(&doyle);
return EXIT_SUCCESS;
}*/
/*(2)编写初始化结构变量函数init()，参数为结构的指针。函数功能是将结构变量中的成员进行初始化。
#include <stdio.h>
#include <stdlib.h>
struct Library {
const char title[20];
const char author[10];
double price;
} panshin;
void init(struct Library *doyle, struct Library *dicken, struct Library *panshin) {
doyle ->title;
dicken ->author;
panshin ->price;
}
int main(void) {
struct Library doyle = { "My life as a budgie", "Mack Tom", 14.6 };
struct Library dicken ={ "Thinking in C++", "Stephen Prata", 78 };
struct Library panshin = { "C++ Prinner", "Stanley Lippman", 92.5 };
init(&doyle,&dicken,&panshin);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
doyle->title, doyle->author, doyle->price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
dicken->title, dicken->author, dicken->price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
panshin->title, panshin->author, panshin->price);
return EXIT_SUCCESS;
}
*/
/*(3)编写从键盘上接受图书信息的函数input()，参数为结构的指针。函数的功能是从键盘上接收相关图
书信息，并将信息保存到指针所执行的图书结构变量里。
#include <stdio.h>
#include <stdlib.h>
struct Library {
const char title[20];
const char author[10];
double price;
};
void input(struct Library *doyle,struct Library dicken,){
scanf("%s%s%lf", doyle->title, doyle->author,&doyle->price);
scanf("%s%s%lf",dicken->title, dicken->author, &dicken->price);
scanf("%s%s%lf", panshin->title, panshin->author, &panshin->price);
}
int main(void) {
struct Library doyle;
struct Library dicken;
struct Library panshin ;
input(&doyle,&dicken,&panshin);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
doyle->title, doyle->author, doyle->price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
dicken->title, dicken->author, dicken->price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
panshin->title, panshin->author, panshin->price);
return EXIT_SUCCESS;
}*/
/*(4)主程序按照下面流程完成功能实现：
a)定义三个图书对象doyle、dicken、panshin。
b)对结构对象进行初始化。
c)从键盘上接收图书信息，分别保存到三个图书对象中。
d)输出三个图书对象的图书信息。
#include <stdio.h>
#include <stdlib.h>
struct Library {
const char title[20];
const char author[10];
double price;
}doyle,dicken,panshin;
int main(void) {
struct Library doyle;
struct Library dicken;
struct Library panshin ;
scanf("%s%s%lf", &doyle.title, &doyle.author, &doyle.price);
scanf("%s%s%lf",&dicken.title, &dicken.author, &dicken.price);
scanf("%s%s%lf", &panshin.title, &panshin.author, &panshin.price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
doyle.title, doyle.author, doyle.price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
dicken.title, dicken.author, dicken.price);
printf("The title is: %s\n The author is : %s\n The price is : %.1lf",
panshin.title, panshin.author, panshin.price);
return EXIT_SUCCESS;
}
*/
第三题：
创建一个图书馆library（结构数组），里面一共包含了上面这三本书。
创建一个结构数组library，使用上面所设计的函数init()对每本书进行初始化。
使用上面所设计的函数input()从键盘上接收图书信息。
使用上面的函数show，将输入的图书信息显示出来。
#include <stdio.h>
#include <stdlib.h>
struct Library {
const char title[20];
const char author[10];
double price;
} book[3];
void input(struct Library *(book+1),struct Library *(book+2),struct Library *(book+3)){
scanf("%s%s%lf", (book+1)->title, (book+1)->author
补充：软件开发 , C语言 ,上一个：C语言学习笔记
下一个：C语言中结构体小技巧
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