C++ MFC 获取当前日期和时间
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C++ MFC Get current date and time
提问by Adam
I've been programming in VB.NET for most of my very programming career. I have a C++ project provided to me, which I need to make a few modifications, and I am feeling hopelessly lost and confused.
在我的大部分编程生涯中，我一直在使用 VB.NET 进行编程。我有一个 C++ 项目提供给我，我需要对其进行一些修改，我感到绝望和迷茫。
It is a Visual Studio 2008 MFC project in C++.
它是一个 C++ 中的 Visual Studio 2008 MFC 项目。
an output variable has been defined:
定义了一个输出变量：
char szout[900];
This line below, is used to append values to the output variable before output:
下面的这一行用于在输出之前将值附加到输出变量：
strcpy(szout, "TextHere")
So one of the many examples from searching, that i have tried, was to include at the top:
因此，我尝试过的众多搜索示例之一是将其包含在顶部：
#include <windows.h>
And then for my code:
然后对于我的代码：
SYSTEMTIME st;
GetSystemTime(&st);
char myDate[20] = st;
CT2CA outputDate(myDate);
strcat(szout, outputDate);
For some reason the variables appended on to szout must be of type CT2CA, which i'm not really sure what this is either.
出于某种原因，附加到 szout 的变量必须是 CT2CA 类型，我也不确定这是什么。
But then I get the following errors on the second and third line (char myDate...etc...) and (CT2CA output....etc....)
但是随后我在第二行和第三行（char myDate...等...）和（CT2CA 输出......等...）上收到以下错误
error C2440: 'initializing' : cannot convert from 'SYSTEMTIME' to 'char [20]'
error C2664: 'ATL::CW2AEX<>::CW2AEX(LPCWSTR) throw(...)' : cannot convert parameter 1 from 'char [20]' to 'LPCWSTR'
So I'll clarify, I am a complete novice with this, and would appreciate any and all help.
所以我要澄清一下，我是一个完整的新手，并希望得到任何和所有帮助。
Thank you,
谢谢，
回答by Chad
If you are using MFC, why not:
如果您使用的是 MFC，为什么不：
// uses printf() format specifications for time
CString t = CTime::GetCurrentTime().Format("%H:%M");
// Or, if you have OLE Support
CString t = COleDateTime::GetCurrentTime().Format("%H:%M");
回答by Pabitra Dash
In MFC the following code is for current date in MMDDYYYY format.
在 MFC 中，以下代码用于 MMDDYYYY 格式的当前日期。
CTime t = CTime::GetCurrentTime();
CString s = t.Format("%m%d%Y");
