getchar与getch

最新推荐文章于 2021-05-13 16:51:57 发布

stars2009

最新推荐文章于 2021-05-13 16:51:57 发布

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本文详细介绍了标准函数getchar以及非标准函数getch和getche的功能与使用场景。getchar用于从输入流中读取字符，适用于所有编译器；getch则用于直接读取键盘输入的字符，无需按Enter键确认。

getchar
This is a standard function that gets a character from the stdin.

getch
This is a nonstandard function that gets a character from keyboard, does not echo to screen.

getche
This is a nonstandard function that gets a character from the keyboard, echoes to screen.

Use getchar if you want it to work on all compilers. Use getch or getche on a system that supports it when you want keyboard input without pressing [Enter].

And note that the return value of all three is int! You need this to properly check for EOF.

getchar从输入流中读取字符，所以要有回车的介入，getchar才能判断出一个流的结束。

getch是直接读取一个键值，敲了键盘他就读取了。