C - 比较字符串字面量与字符数组 [英] C - Comparing string literal with character array

问题描述

我是C的新手，对于如何通过字符数组使用字符串仍然有点困惑。

I am new to C and am still a bit confused about how to use strings via character arrays.

在我的C程序中，我接受用户的命令：

In my C program, I am accepting commands from the user:

char command[20];
scanf("%s",command);

当然，我想知道他们输入了什么命令==hello），然后做某事）。我知道这是不可能在C，因为我比较字符串字面量到字符数组，但什么会是一个好的方法呢？我尝试使用strcmp（命令，hello），仍然有错误。

Of course, afterwards I want to figure out what command they typed (something similar to "if (command == "hello"), then do something"). I know this is not possible in C because I am comparing a string literal to a character array, but what would be a good way to it? I have tried using strcmp(command, "hello") and still got errors.

任何建议，你可以提供将非常感谢。谢谢！

Any advice you can provide would be very appreciated. Thank you!

推荐答案

当字符串相同时，strcmp返回0。我有代码使用strcmp比较字符数组到字符串字面量，我很困惑，当它不工作。结果是，我错了，假设它将返回1当字符串是相同的！

strcmp returns 0 when the strings are the same. I have code that uses strcmp comparing character arrays to string literals, and I was quite confused when it wasn't working. Turns out it was wrong for me to assume it would return 1 when the string are the same!

也许你犯了同样的错误吗？

Maybe you've made the same mistake?

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