单链表1相关，创建失败

马尔代夫海峡

照着小甲鱼的视频打的，但是出了些问题。

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. 
   
4. struct Book
   
5. {
   
6.     char title[128];
   
7.     struct Book *next;
   
8. };
   
9. 
   
10. void getInput(struct Book *book)
    
11. {
    
12.     printf("书名：");
    
13.     scanf("%s", book->title);
    
14. }
    
15. 
    
16. void addbook(struct Book **library)
    
17. {
    
18.     struct Book *book, *temp;
    
19.     book = (struct Book *)malloc(sizeof(struct Book));
    
20.     if (book == NULL)
    
21.     {
    
22.         printf("内存分配失败\n");
    
23.         exit(1);
    
24.     }
    
25.    
    
26.     getInput(book);
    
27.    
    
28.     if (*library != NULL)
    
29.     {
    
30.         temp = *library;
    
31.         *library = book;
    
32.         book->next = temp;
    
33.     }else
    
34.     {
    
35.         *library = book;
    
36.         book->next = NULL;
    
37.     }
    
38.    
    
39. }
    
40. 
    
41. void printLibrary(struct Book *Book)
    
42. {
    
43.     struct Book *book;
    
44.     int count = 1;
    
45.    
    
46.     book = library;      
    
47.     while (book != NULL)
    
48.     {
    
49.         printf("book%d\n", count);
    
50.         printf("书名:%s", book->title);
    
51.         book = book->next;
    
52.         count++;
    
53.     }
    
54.    
    
55. }
    
56. 
    
57. void releaseLibrary(struct Book *library)
    
58. {
    
59.     struct Book *temp;
    
60. 
    
61.     while (*library != NULL)
    
62.     {
    
63.         temp = *library;
    
64.         *library = (*library)->next;
    
65.         free(temp);
    
66.     }
    
67. 
    
68. }
    
69. 
    
70. int main(void)
    
71. {
    
72.     struct Book *library = NULL;
    
73. 
    
74. 
    
75.     addbook(&library);
    
76.     printLibrary(library);
    
77.     releaseLibrary(library);
    
78. 
    
79.     return 0;
    
80. }

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然后报错了

   

1. cpjiayu.cpp: In function 'void printLibrary(Book*)':
   
2. cpjiayu.cpp:46:12: error: 'library' was not declared in this scope
   
3.    46 |     book = library;
   
4.       |            ^~~~~~~
   
5. cpjiayu.cpp: In function 'void releaseLibrary(Book*)':
   
6. cpjiayu.cpp:61:21: error: no match for 'operator!=' (operand types are 'Book' and 'long long int')
   
7.    61 |     while (*library != NULL)
   
8.       |            ~~~~~~~~ ^~
   
9.       |            |
   
10.       |            Book
    
11. cpjiayu.cpp:63:16: error: cannot convert 'Book' to 'Book*' in assignment
    
12.    63 |         temp = *library;
    
13.       |                ^~~~~~~~
    
14.       |                |
    
15.       |                Book
    
16. cpjiayu.cpp:64:30: error: base operand of '->' has non-pointer type 'Book'
    
17.    64 |         *library = (*library)->next;
    
18.       |                              ^~

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视频里小甲鱼直接就book = library 也没什么问题呀，为什么我自己就要引用点啥呢？
后面两个错误就完全不知道因为什么了。也没弄明白自己哪没学明白。求大佬们指点一波

马尔代夫海峡

困扰好久了