crt

之前由于要研究一下VC编译选项对于最终编译出来的模块尺寸的影响，所以就顺便研究了一下Windows的CRT库的相关知识，收集如下： （转载自:http://www.cnblogs.com/chio/archive/2007/11/26/972152.html） [关于CRT] 　　CRT原先是指Microsoft开发的C Runtime Library，用于操作系统的开发及运行。后来在此基础上开发了C++ Runtime Library，所以现在CRT是指Microsoft开发的C/C++ Runtime Library。在VC的CRT/SRC目录下，可以看到CRT的源码，不仅有C的，也有C++的。 　　CRT原先的目的就是支持操作系统的运行。因为Windows操作系统除汇编部分外，都是用C/C++编写的，所以内核及许多关键服务都在CRT上运行（它们都采用dll技术动态链接）。此外，用 VC编写的C/C++程序也用到它们（可以动态链接，也可以静态链接，前者运行时需要系统中已安装CRT的dll，后者不需要）。可以说，CRT就是 Microsoft编写Windows时使用的低层类库。然后，它又被当作C++标准库的一个实现包含在了VC系列中；我们在VC中使用的C++标准库， 其实就是CRT的一个真子集（少了C++标准所不包含的代码，特别是大量的低层C代码）。 　

Possible Duplicate: How to get .pem file from .key and .crt files? How can I convert .crt to .pem? MrEyes You can do this conversion with the OpenSSL library http://www.openssl.org/ Windows binaries can be found here: http://www.slproweb.com/products/Win32OpenSSL.html Once you have the library installed, the command you need to issue is: openssl x509 -in mycert.crt -out mycert.pem -outform PEM NeilG I found the OpenSSL answer given above didn't work for me, but the following did, working with a CRT file sourced from windows. openssl x509 -inform DER -in yourdownloaded.crt -out outcert.pem

In Visual Studio, there's the compile flags /MD and /MT which let you choose which kind of C runtime library you want. I understand the difference in implementation, but I'm still not sure which one to use. What are the pros/cons? One advantage to /MD that I've heard, is that this allows someone to update the runtime, (like maybe patch a security problem) and my app will benefit from this update. Although to me, this almost seems like a non-feature: I don't want people changing my runtime without allowing me to test against the new version! Some things I am curious about: How would this affect

中国剩余定理（CRT） 中国剩余定理出自中国的某本古书，似乎是孙子兵法？（雾 其中有这样一个问题： 有物不知其数，三三数之剩二，五五数之剩三，七七数之剩二。问物几何？ 即，对于这样一个方程组： \[ \begin{cases}x\equiv a_1\pmod{m_1}\\x\equiv a_2\pmod{m_2}\\x\equiv a_3\pmod{m_3}\\\dots\\x\equiv a_i\pmod{m_i}\end{cases} \] 我们已知所有 \(a_i,m_i\) ，求可行解 \(x\) ，可以证明的是， 若所有 \(m_i\) 互质，那么该方程组有唯一解。 可以构造出一个解：如果有 \(k\) 个方程，设 \(M=\prod_{i=1}^k m_i,n_i=\frac{M}{m_i}\) ，则有 \(x=\sum_{i=1}^k a_in_in_i^{-1}\pmod{M}\) 。 扩展中国剩余定理（EXCRT） 扩展中国剩余定理不要求 \(m_i\) 互质，其结论是由数学归纳法得出的，跟CRT实际上没太大关系。这种情况下，方程组的解是不唯一的。 首先考虑两个方程的情况。 假设我们有 \(x\equiv a_1\pmod{m_1},x\equiv a_2\pmod{m_2}\) ，那么显然 \(x+m_1*t_1=a_1,x+m_2*t_2=a_2\) ，其中

I am facing this .dll library missing error: This programme can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing. Try to reinstall this. When I try to open an Microsoft Office file. How do I solve that? alireza valipour The default solution is to install KB2999226 of Microsoft. KeshV While the answer from alireza is correct, it has one gotcha: You can't install Microsoft Visual C++ 2015 redist (runtime) unless you have Windows Update KB2999226 installed (at least on Windows 7 64-bit SP1). Vinayak Shedgeri Recursively update Windows 7 until it shows no more updates, using Windows