vault backup: 2026-01-23 21:00:23

.obsidian/workspace.json

@@ -157,12 +157,13 @@
             "state": {
               "type": "outline",
               "state": {
+                "file": "YueQian/Homework/1.23.md",
                 "followCursor": true,
                 "showSearch": false,
                 "searchQuery": ""
               },
               "icon": "lucide-list",
-              "title": "大纲"
+              "title": "1.23 的大纲"
             }
           },
           {
@@ -273,7 +274,7 @@
             }
           }
         ],
-        "currentTab": 2
+        "currentTab": 3
       },
       {
         "id": "bf1e7d1a52b4651c",
@@ -294,8 +295,7 @@
       }
     ],
     "direction": "horizontal",
-    "width": 336.5,
-    "collapsed": true
+    "width": 336.5
   },
   "left-ribbon": {
     "hiddenItems": {
@@ -316,7 +316,7 @@
       "remotely-save:Remotely Save": false
     }
   },
-  "active": "1fec176bb492eafb",
+  "active": "5e96455aab22a229",
   "lastOpenFiles": [
     "YueQian/相关网站.md",
     "YueQian/Homework/1.23.md",

YueQian/Homework/1.23.md

@@ -86,5 +86,38 @@ int main(int argc, char const *argv[])
 	d. 增加输入校验：若输入的 ASCII 码超出 0-127 范围，输出 “无效的 ASCII 码”；若输入的不是单个字符，输出 “输入格式错误”；
 	e. 核心要求：使用scanf的返回值判断输入是否有效，结合格式化控制符完成输入输出
 ```c
+#include <stdio.h>
 
+int main(int argc, char const *argv[])
+{
+    int ret = 0,cho = 0;
+    char ch;
+    int num;
+
+    printf("输入 1（字符转 ASCII）、2（ASCII 转字符）：");
+    scanf("%d",&cho);
+    if(1 == cho)
+    {
+        ret = scanf(" %c",&ch);
+        if(1 != ret)
+            printf("输入格式错误 @__@ \n");
+        else
+            printf("%d\n",(int)ch);
+    }
+    else if(2 == cho)
+    {
+        scanf("%d",&num);
+        if(0 <= num && 127 >= num )
+        {
+            printf("%c\n",(char)num);
+        }
+        else
+            printf("无效的 ASCII 码 ^__^ \n");
+    }
+    else
+        printf("无效值\n");
+        
+    return 0;
+
+}
 ```