C字符串追加 [英] C string append

问题描述

我已经得到了我想要追加和结果应该被分配到一个LHS变量两个C字符串。我看到了一个静态初始化code，如：

I've got two C strings that I want to append and result should be assigned to an lhs variable. I saw a static initialization code like:

的char * OUT =愿上帝保佑; 。

输出真的五一GodBless你上打印出来。我理解这个结果可能是一些不确定的行为输出。

The output was really "May GodBless You" on printing out. I understand this result can be output of some undefined behaviour.

在code竟是生产，从来不给错误的结果。而且它不像我们只在一个地方有这样的语句。它可以在很稳定code的多个地方看到并用于形成SQL查询。

The code was actually in production and never gave wrong results. And it was not like we had such statements only at one place. It could be seen at multiple places of very much stable code and were used to form sql queries.

请问C标准允许这样的串联？

Does C standard allow such concatenation?

推荐答案

是的，这是保证。

http://en.wikipedia.org/wiki/C_syntax#String_literal_concatenation：

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Adjacent string literals are concatenated at compile time; this allows long strings to be split over multiple lines, and also allows string literals resulting from C preprocessor defines and macros to be appended to strings at compile time

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