visual-studio 在 Visual Studio C++ 构建中打印日期和时间？
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Print Date and Time In Visual Studio C++ build?
提问by Brock Woolf
How would I print the date and time for the purposes of the build. Ie: When the console for my application starts up I want to do this:
为了构建的目的，我将如何打印日期和时间。即：当我的应用程序的控制台启动时，我想这样做：
Binary Build date: 03/03/2009 @ 10:00AM
Binary Build date: 03/03/2009 @ 10:00AM
I think this would be a super useful function for all applications to have behind the scenes for programmers, especially in a team environment.
我认为这对于所有应用程序在幕后为程序员提供的超级有用的功能，尤其是在团队环境中。
Is there a simple way to do this using Visual Studio 2008 in C++. Thanks.
有没有一种简单的方法可以在 C++ 中使用 Visual Studio 2008 来做到这一点。谢谢。
回答by Virne
Use preprocessor's __DATE__and __TIME__.
使用预处理器的__DATE__和__TIME__.
printf("Binary build date: %s @ %s\n", __DATE__, __TIME__);
For making sure that cpp file that contains this code is really compiled, I use touch-utility for file as a pre-build step: touch file.cpp
为了确保真正编译包含此代码的 cpp 文件，我使用 touch-utility for file 作为预构建步骤： touch file.cpp
Touch.bat:
触摸.bat：
@copy nul: /b +%1 tmp.$$$
@move tmp.$$$ %1
回答by dirkgently
You can use the macros __TIME__and __DATE__. Note the double underscores. These are unrolled at compile time and hence you will get the last compile time saved in your file(s).
您可以使用宏__TIME__和__DATE__. 注意双下划线。这些在编译时展开，因此您将获得保存在文件中的最后编译时间。
回答by dirkgently
Note that the time and date macros only work as desired if the particular file containing them is guaranteed to be compiled during every build.
请注意，如果确保在每次构建期间编译包含时间和日期宏的特定文件，则时间和日期宏仅按需要工作。
回答by saw-lau
One way of doing this would be using the built-in __DATE__and __TIME__macros. From MSDN (for VS 2005):
一种方法是使用内置宏__DATE__和__TIME__宏。来自 MSDN（对于 VS 2005）：
__DATE__: The compilation date of the current source file. The date is a string literal of the form Mmm dd yyyy. The month name Mmm is the same as for dates generated by the library function asctime declared in TIME.H.
__TIME__: The most recent compilation time of the current source file. The time is a string literal of the form hh:mm:ss.
__DATE__: 当前源文件的编译日期。日期是格式为 Mmm dd yyyy 的字符串文字。月份名称 Mmm 与 TIME.H 中声明的库函数 asctime 生成的日期相同。
__TIME__: 当前源文件的最近编译时间。时间是 hh:mm:ss 形式的字符串文字。
回答by User
Similar to Virne's answer I created a simple header file called "BuildDate.h" with the following contents:
与 Virne 的回答类似，我创建了一个名为“BuildDate.h”的简单头文件，其中包含以下内容：
#define BUILD_DATE __DATE__ " " __TIME__
I touch the file using GnuWin32touch command in my pre-build event:
我在预构建事件中使用GnuWin32touch 命令触摸文件：
touch.exe BuildDate.h
Then I include the header file in any code where I want access to the BUILD_DATEstring. E.g.:
然后我将头文件包含在我想要访问BUILD_DATE字符串的任何代码中。例如：
#include "BuildDate.h"
...
logger->Log("Build Date: " BUILD_DATE);
