[已解决]为什么b1,b2是未初始化局部变量啊

shallow丶

#include<stdio.h>

struct Date
{
        int year;
        int month;
        int day;
};

struct Book
{
        char title[128];
        char author[40];
        float price;
        struct Date date;
        char publisher[40];
};

struct Book getInput(struct Book book);
void printBook(struct Book book);

struct Book getInput(struct Book book)
{
        printf("请输入书名：");
        scanf_s("%s", book.title);
        printf("请输入作者：");       
        scanf_s("%s", book.author);
        printf("请输入价格：");
        scanf_s("%.2f", &book.price);
        printf("请输入日期：");
        scanf_s("%d-%d-%d", &book.date.year, &book.date.month, &book.date.day);
        printf("请输入出版社：");
        scanf_s("%s", book.publisher);

        return book;
}

void printBook(struct Book book)
{
        printf("书名：%s\n", book.title);
        printf("作者：%s\n", book.author);
        printf("售价：%.2f\n", book.price);
        printf("日期：%d-%d-%d\n", book.date.year, book.date.month, book.date.day);
        printf("出版社：%s\n", book.publisher);
}

int main(void)
{
        struct Book b1, b2;

        printf("请录入第一本书的信息：\n");
        b1 = getInput(b1);
        putchar('\n');
        printf("请录入第二本书的信息：\n");
        b2 = getInput(b2);

        printf("\n\n录入完毕，现在开始打印...\n\n");

        printf("打印第一本书的信息...");
        printBook(b1);
        putchar('\n');
        printf("打印第二本书的信息...");
        printBook(b2);

        return 0;
}

最佳答案

月排行榜 / 总排行榜

人造人

2021-12-16 22:13:45

1. #include <stdio.h>
   
2. 
   
3. struct Date
   
4. {
   
5.         int year;
   
6.         int month;
   
7.         int day;
   
8. };
   
9. 
   
10. struct Book
    
11. {
    
12.         char title[128];
    
13.         char author[40];
    
14.         float price;
    
15.         struct Date date;
    
16.         char publisher[40];
    
17. };
    
18. 
    
19. //struct Book getInput(struct Book book);
    
20. //void printBook(struct Book book);
    
21. 
    
22. //struct Book getInput(struct Book book)
    
23. //struct Book *getInput(struct Book *book)
    
24. void getInput(struct Book *book)
    
25. {
    
26.         printf("请输入书名：");
    
27.         //scanf_s("%s", book.title);
    
28.         scanf("%s", book->title);
    
29.         printf("请输入作者：");      
    
30.         //scanf_s("%s", book.author);
    
31.         scanf("%s", book->author);
    
32.         printf("请输入价格：");
    
33.         //scanf_s("%.2f", &book.price);
    
34.         scanf("%2f", &book->price);
    
35.         printf("请输入日期：");
    
36.         //scanf_s("%d-%d-%d", &book.date.year, &book.date.month, &book.date.day);
    
37.         scanf("%d-%d-%d", &book->date.year, &book->date.month, &book->date.day);
    
38.         printf("请输入出版社：");
    
39.         //scanf_s("%s", book.publisher);
    
40.         scanf("%s", book->publisher);
    
41. 
    
42.         //return book;
    
43. }
    
44. 
    
45. //void printBook(struct Book book)
    
46. void printBook(struct Book *book)
    
47. {
    
48.         /*
    
49.         printf("书名：%s\n", book.title);
    
50.         printf("作者：%s\n", book.author);
    
51.         printf("售价：%.2f\n", book.price);
    
52.         printf("日期：%d-%d-%d\n", book.date.year, book.date.month, book.date.day);
    
53.         printf("出版社：%s\n", book.publisher);
    
54.         */
    
55.         printf("书名：%s\n", book->title);
    
56.         printf("作者：%s\n", book->author);
    
57.         printf("售价：%.2f\n", book->price);
    
58.         printf("日期：%d-%d-%d\n", book->date.year, book->date.month, book->date.day);
    
59.         printf("出版社：%s\n", book->publisher);
    
60. }
    
61. 
    
62. int main(void)
    
63. {
    
64.         struct Book b1, b2;
    
65. 
    
66.         printf("请录入第一本书的信息：\n");
    
67.         //b1 = getInput(b1);
    
68.         getInput(&b1);
    
69.         putchar('\n');
    
70.         printf("请录入第二本书的信息：\n");
    
71.         //b2 = getInput(b2);
    
72.         getInput(&b2);
    
73. 
    
74.         printf("\n\n录入完毕，现在开始打印...\n\n");
    
75. 
    
76.         printf("打印第一本书的信息...");
    
77.         //printBook(b1);
    
78.         printBook(&b1);
    
79.         putchar('\n');
    
80.         printf("打印第二本书的信息...");
    
81.         //printBook(b2);
    
82.         printBook(&b2);
    
83. 
    
84.         return 0;
    
85. }
    

复制代码

跳转到最佳答案楼层

人造人

1. #include <stdio.h>
   
2. 
   
3. struct Date
   
4. {
   
5.         int year;
   
6.         int month;
   
7.         int day;
   
8. };
   
9. 
   
10. struct Book
    
11. {
    
12.         char title[128];
    
13.         char author[40];
    
14.         float price;
    
15.         struct Date date;
    
16.         char publisher[40];
    
17. };
    
18. 
    
19. //struct Book getInput(struct Book book);
    
20. //void printBook(struct Book book);
    
21. 
    
22. //struct Book getInput(struct Book book)
    
23. //struct Book *getInput(struct Book *book)
    
24. void getInput(struct Book *book)
    
25. {
    
26.         printf("请输入书名：");
    
27.         //scanf_s("%s", book.title);
    
28.         scanf("%s", book->title);
    
29.         printf("请输入作者：");      
    
30.         //scanf_s("%s", book.author);
    
31.         scanf("%s", book->author);
    
32.         printf("请输入价格：");
    
33.         //scanf_s("%.2f", &book.price);
    
34.         scanf("%2f", &book->price);
    
35.         printf("请输入日期：");
    
36.         //scanf_s("%d-%d-%d", &book.date.year, &book.date.month, &book.date.day);
    
37.         scanf("%d-%d-%d", &book->date.year, &book->date.month, &book->date.day);
    
38.         printf("请输入出版社：");
    
39.         //scanf_s("%s", book.publisher);
    
40.         scanf("%s", book->publisher);
    
41. 
    
42.         //return book;
    
43. }
    
44. 
    
45. //void printBook(struct Book book)
    
46. void printBook(struct Book *book)
    
47. {
    
48.         /*
    
49.         printf("书名：%s\n", book.title);
    
50.         printf("作者：%s\n", book.author);
    
51.         printf("售价：%.2f\n", book.price);
    
52.         printf("日期：%d-%d-%d\n", book.date.year, book.date.month, book.date.day);
    
53.         printf("出版社：%s\n", book.publisher);
    
54.         */
    
55.         printf("书名：%s\n", book->title);
    
56.         printf("作者：%s\n", book->author);
    
57.         printf("售价：%.2f\n", book->price);
    
58.         printf("日期：%d-%d-%d\n", book->date.year, book->date.month, book->date.day);
    
59.         printf("出版社：%s\n", book->publisher);
    
60. }
    
61. 
    
62. int main(void)
    
63. {
    
64.         struct Book b1, b2;
    
65. 
    
66.         printf("请录入第一本书的信息：\n");
    
67.         //b1 = getInput(b1);
    
68.         getInput(&b1);
    
69.         putchar('\n');
    
70.         printf("请录入第二本书的信息：\n");
    
71.         //b2 = getInput(b2);
    
72.         getInput(&b2);
    
73. 
    
74.         printf("\n\n录入完毕，现在开始打印...\n\n");
    
75. 
    
76.         printf("打印第一本书的信息...");
    
77.         //printBook(b1);
    
78.         printBook(&b1);
    
79.         putchar('\n');
    
80.         printf("打印第二本书的信息...");
    
81.         //printBook(b2);
    
82.         printBook(&b2);
    
83. 
    
84.         return 0;
    
85. }
    

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海的上方是天空

定义 b1 , b2 的时候没有初始化啊

shallow丶

人造人 发表于 2021-12-16 22:13

还得是指针啊

人造人

shallow丶 发表于 2021-12-17 14:10
还得是指针啊

对呀