Merge branch 'master' of https://bdgit.educoder.net/pfh4wq3fa/ssssss

app.c

@@ -2,6 +2,14 @@
 #include <stdlib.h>
 #include "data.h"
 
+struct book{
+    int id;
+    char name;
+    char author;
+    float price;
+    struct book *next;
+}*books;
+
 
 
 
@@ -98,10 +106,56 @@ int make_choice(void)
 
 
 
-int confirm(const char* msg)
+// 添加新图书信息
+void add_data() 
+{ 
+    struct book *p, *q;
+    
+    p = (struct book*)malloc(sizeof(struct book));
+    
+    printf("请依次输入图书信息:\n");
+    printf("图书编号:");
+    scanf("%d", &p->id);
+    printf("图书名称:");
+    scanf("%s", p->name);
+    printf("图书作者:");
+    scanf("%s", p->author); 
+    printf("图书价格:");
+    scanf("%f", &p->price);
+    
+    q = books;
+    while(q != NULL && p->id > q->id)
+        q = q->next;
+        
+    p->next = q;  // 指向下一个节点
+    books = p;    // 新节点成为链表头
+    
+    printf("图书信息添加成功!\n"); 
+}
+// 更新图书信息
+void update_data()
 {
-    char c = 'n';                // 默认选择是 no
-    printf("%s(Y/N): ", msg);    // 提示输入 yes/no 进行确认
-    scanf(" %c%*[^\n]", &c);     // 读取第一个字符，忽略剩余字符
-    return c == 'y' || c == 'Y'; // 返回确认结果
+    int id;
+    struct book *p;
+    
+    printf("请输入要修改的图书编号:");
+    scanf("%d", &id);
+    
+    p = find(id);     // 查找编号为id的图书
+    if(p != NULL)
+    {
+        printf("请依次输入修改后的图书信息:\n");
+        printf("图书名称:");
+        scanf("%s", p->name);
+        printf("图书作者:");
+        scanf("%s", p->author); 
+        printf("图书价格:");
+        scanf("%f", &p->price);
+        
+        printf("图书信息修改成功!\n");
+    }
+    else
+    {
+        printf("没有找到编号为%d的图书!\n", id);
+    }
 }