获得字符数组的一部分 [英] Get part of a char array

问题描述

我觉得这是一个非常愚蠢的问题，但我似乎无法在别处找到答案！

I feel like this is a really silly question, but I can't seem to find an answer anywhere!

是否有可能从一个字符数组得到一组字符的？扔了一些伪code：

Is it possible to get a group of chars from a char array? to throw down some pseudo-code:

char arry[20] = "hello world!";
char part[10] = arry[0-4];
printf(part);

输出：

hello

所以，我可以从像这样的字符数组的一段不循环，让他们炭由-char或转换为字符串，所以我可以用SUBSTR（）？

So, can I get a segment of chars from an array like this without looping and getting them char-by-char or converting to strings so I can use substr()?

推荐答案

在短，没有。 C风格的弦根本就没有这样的。你将不得不使用手动循环，或函数strncpy（），或通过C做++ 的std :: string的功能。鉴于你在C ++中，你不妨做一切与C ++字符串！

In short, no. C-style "strings" simply don't work that way. You will either have to use a manual loop, or strncpy(), or do it via C++ std::string functionality. Given that you're in C++, you may as well do everything with C++ strings!

侧面说明

碰巧的是，为您的特定示例应用程序，您可以通过按的printf提供的功能，只是实现这个（）：

As it happens, for your particular example application, you can achieve this simply via the functionality offered by printf():

printf("%.5s\n", arry);

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