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Author SHA1 Message Date
4019820209 vault backup: 2026-01-23 19:07:28 2026-01-23 19:07:28 +08:00
43194a2e7c vault backup: 2026-01-23 19:02:27 2026-01-23 19:02:27 +08:00
2 changed files with 36 additions and 5 deletions

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YueQian/Homework/1.23.md Normal file
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@@ -0,0 +1,15 @@
---
tags:
aliases: empty
日期: 2026/1/23
---
1. 定义`int num = 255`,分别以十进制(有符号)、无符号十进制、八进制(带 / 不带前缀)、十六进制(小写带 / 不带前缀、大写带 / 不带前缀) 格式输出;
2. 定义`long num_long = 123456789``long long num_ll = 9876543210`,分别用对应控制符输出;
3. 定义`float pi = 3.1415926`,分别以默认小数形式、保留 2 位小数、指数形式(保留 3 位精度) 输出;
4. 定义字符串`char *name = "Programmer"`,分别输出完整字符串、前 5 个字符、左对齐占 10 位、右对齐占 10 位的格式;
5. 编写一个综合程序结合格式化输入输出、类型转换、IO 流知识点,实现 “字符↔ASCII 码” 双向转换:
1. 提示用户选择功能:输入 1字符转 ASCII、2ASCII 转字符);
2. 若选择 1接收用户输入的单个字符注意需处理 scanf 接收字符时的缓冲区问题),输出该字符的 ASCII 码结合类型转换char→int
3. 若选择 2接收用户输入的 ASCII 码值0-127输出对应的字符int→char显式转换
4. 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”;
5. 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