Merge pull request '11-12' (#8) from gggg into master

图书管理系统.c

@@ -268,5 +268,56 @@ void returnBook(Reader* reader1, Book* book1)
 }
 
 //C11
-
-//C12
+void save(Book* book1)
+{
+    FILE* fp;
+    Book* pCur = book1;
+    int iCount = 0;
+    if (pCur == NULL)
+    {
+        printf("\n没有学生记录!\n");
+        return;
+    }
+    if ((fp = fopen("book.txt", "wb")) == NULL)
+    {
+        printf("创建文件失败!\n");
+        getchar();
+        exit(1);
+    }
+    while (pCur)
+    {
+        fwrite(pCur, sizeof(Book), 1, fp);
+        pCur = pCur->next;
+        iCount++;
+    }
+    printf("\n");
+    printf("保存文件的数据数目为:%d\n", iCount);
+    fclose(fp);
+}
+//C12
+Book* read1()
+{
+    FILE* fp;
+    Book* pHead = NULL, * pTemp = NULL, * pCur = NULL;
+    if ((fp = fopen("book.txt", "r")) == NULL)
+    {
+        printf("\n文件打开失败!请检查文件名!\n");
+        exit(0);
+    }
+    pTemp = (Book*)malloc(sizeof(Book));
+    while (fread(pTemp, sizeof(Book), 1, fp))
+    {
+        if (!pHead)
+        {
+            pHead = pCur = pTemp;
+        }
+        else
+        {
+            pCur->next = pTemp;
+            pCur = pTemp;
+        }
+        pTemp = (Book*)malloc(sizeof(Book));
+    }
+    fclose(fp);
+    return pHead;
+}