C 语言：如何读取像“SomeWord(Int)”这样的输入，没有空格，只有一个单词，然后是圆括号内的数字

发布于 2025-01-13 11:33:09 字数 482 浏览 4 评论 0原文

我需要从用户那里获取单行输入，并且有 5 个值，我从该输入中提取这些值（“c”需要为 5）。输入的格式是：“单词（数字）数字单词句子”。但问题出在“单词（数字）”输入区域。我无法获取它，以便从输入的该部分读取值并将其存储在命令和 num1 中。下面是我尝试过的代码，但它似乎不起作用。

c = sscanf (line, "%s(%d) %d %s %128[^\n]", command, num1, num2, message, message2);

当我这样做时，用户输入“单词（数字）数字单词句子”，括号前有一个空格，同时还将代码从 %s(%d)< /code> 到 %s (%d)，这似乎有效。但我需要它的值 command 和 num1 之间没有任何空格。

原文

I need to take input from the user that is a single line and has 5 values which I extract from that input ('c' needs to be 5). The input is this format: "word(number) number word sentence". But the problem is with the "word(number)" input area. I cannot get it so that the values are read from that part of the input and stored in command, and num1. Below is the code I tried but it does not seem to be working.

c = sscanf (line, "%s(%d) %d %s %128[^\n]", command, num1, num2, message, message2);

When I make it so that the user enters "word (number) number word sentence" instead, with a space before the brackets, with also changing the code from %s(%d) to %s (%d), that seems to work. But I need it without any space between the values command and num1.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

南汐寒笙箫 2025-01-20 11:33:09

您需要从第一个字符串中排除括号。假设“命令”严格是字母数字和下划线，您可以这样做：

c = sscanf(line, "%[_a-zA-Z0-9](%d) %d %s %128[^\n]", command, &num1, &num2, message, message2);

此外，您需要在 num1 和 num2 上使用＆符号；也许那些是拼写错误？

为了安全起见，您应该像对 message2 那样对 command 和 message 进行长度限制。假设“char command[21], message[33];”，这将是：

"%20[_a-zA-Z0-9](%d) %d %32s %128[^\n]"

You will need to exclude the parenthesis from the first string. Assuming the "command" is strictly alphanumeric and underscore, you can do this:

c = sscanf(line, "%[_a-zA-Z0-9](%d) %d %s %128[^\n]", command, &num1, &num2, message, message2);

Also, you need ampersands on num1 and num2; perhaps those were typos?

For safety, you should put length limits on command and message as you do for message2. Assuming 'char command[21], message[33];`, this would be: