windows 我如何在我的程序中使用 _stprintf，有无 UNICODE 支持？
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How can I use _stprintf in my programs, with and without UNICODE support?
提问by Steve Hanov
Microsoft's <tchar.h> defines _stprintfas swprintfif _UNICODEis defined, and sprintfif not. But these functions take different arguments! In swprintf, the second argument is the buffer size, but sprintfdoesn't have this.
Microsoft 的 <tchar.h> 定义_stprintf为swprintfif_UNICODE已定义，sprintf如果未定义。但是这些函数采用不同的参数！在 中swprintf，第二个参数是缓冲区大小，但sprintf没有这个。
Did somebody goof? If so, this is a big one. How can I use _stprintfin my programs, and have them work with and without _UNICODE?
有人偷懒吗？如果是这样，这是一个很大的问题。我如何_stprintf在我的程序中使用，并让它们在有和没有的情况下工作_UNICODE？
回答by MSalters
You're seeing parallel evolution here. swprintfis a latecomer to standard C, after it was discovered that (A) 8 bits is insufficient for text and (B) you should pass buffer sizes along with buffers. TCHARis a microsoft idea to unify ASCII and Unicode APIs. They dropped the ball, missing point (B). The proper TCHARsolution should have been to define _stprintfas either swprintfor snprintf.
你在这里看到了平行进化。swprintf是标准 C 的后来者，在发现 (A) 8 位不足以容纳文本并且 (B) 您应该将缓冲区大小与缓冲区一起传递。TCHAR是微软统一 ASCII 和 Unicode API 的想法。他们丢球，丢了点 (B)。正确的TCHAR解决方案应该是定义_stprintf为swprintfor 或snprintf。
The solution is then to simply wrap <tchar.h>and do this yourself.
解决方案是简单地包装<tchar.h>并自己完成。
回答by dirkgently
these functions take different arguments!
这些函数采用不同的参数！
There are two different versions available with MS compilers. Take a look here. This is in keeping with the ANSI standard. But I think that does not answer your question. I'll skip it for a while and rather tell you how you can have uniformity.
MS 编译器有两个不同的版本。看看这里。这符合 ANSI 标准。但我认为这并不能回答你的问题。我将略过一段时间，而是告诉您如何获得统一性。
have them work with and without _UNICODE?
他们是否可以使用和不使用_UNICODE？
You are better off using the 'safe string functions' as per MS recommendations. See this. Use `_stprintf_s' and I think you will get around your problem.
根据 MS 的建议，您最好使用“安全字符串函数”。看到这个。使用`_stprintf_s'，我想你会解决你的问题。
Did somebody goof?
有人偷懒吗？
EDITED:I don't think so. I don't have the Rationale handy to give you theanswer. I'll post an update when I get my hands on something more concrete. In the meantime look at MSalters' explanation.
编辑：我不这么认为。我没有理由得心应手给你的答案。当我得到更具体的东西时，我会发布更新。同时看看MSalters的解释。
A curious thing is MS's C runtime does notclaim compatibility with the ISO standard.
奇怪的是，MS 的 C 运行时并没有声称与 ISO 标准兼容。
Disclaimer: I am not defending the giant of Redmond, only pointing out stuff that strikes me as odd!
免责声明：我不是在为雷德蒙德的巨人辩护，只是指出让我觉得奇怪的东西！
回答by hunter
This may not be directly answering the question, but one alternative is to use _stprintf_s. You have to add the extra parm, but then it will still compile both ways, and is more future-proof.
这可能不能直接回答问题，但一种替代方法是使用 _stprintf_s. 你必须添加额外的参数，但它仍然会以两种方式编译，并且更适合未来。
