需要澄清有关的getchar（）和换行符 [英] Clarification needed regarding getchar() and newline

问题描述

我有一个关于使用疑问的getchar（）来读取用户输入的字符。

I have a doubt regarding using getchar() to read a character input from the user.

char char1, char2;
char1 = getchar();
char2 = getchar();

我需要获得 2 字符从用户输入。在这种情况下，如果用户输入后跟一个换行，然后字符<$字符'A' C $ C>'B'，什么将被存储在 CHAR2 - 不会是换行字符或字符 'B'？ （我试图在$ C $个cblocks的窗户， CHAR2 实际存储换行符（但我打算它来存储字符'B' ））。我只是想知道预期的行为是什么，以及它是否是编译器相关？如果是这样，用Turbo C和MinGW之间持有什么区别 - 柜面任何人遇到过吧：）

I need to get 2 chars as inputs from the user. In this case, if the user enters the character 'A' followed by a newline, and then the character 'B', what will be stored in char2 - will it be the newline character or the character 'B'? (I tried it on codeblocks on windows, and char2 actually stores the newline character (but I intended it to store the character 'B')). I just want to know what the expected behavior is, and whether it is compiler-dependent? If so, what differences hold between turbo C and mingW - incase anyone has encountered it before :)

推荐答案

是的，你要消耗每个输入后换行：

Yes, you have to consume newlines after each input:

char1 = getchar();
getchar(); // To consume `\n`
char2 = getchar();
getchar(); // To consume `\n`

这是不是编译器相关。这是所有的平台真正的，因为会在每个输入行的末尾回车（虽然实际换行可以跨平台有所不同）。

This is not compiler-dependent. This is true for all platforms as there'll be carriage return at the end of each input line (Although the actual line feed may vary across platforms).

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