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参考：float和double类型的内存分布和比较方法收藏 Comparing floating point numbers总结几点：0. float占4byte，精度是6~7位；double占8byte，精度是15~16位。 1. C/C++的浮点数据类型有float和double两种。它们在内存中是以科学计数法的结果来存储的。 类型float大小为4字节，即32位，内存中的存储方式如下： 符号位（1 bit） 指数（8 bit） 尾数（23 bit） 类型double大小为8字节，即64位，内存布局如下： 符号位（1 bit） 指数（11 bit） 尾数（52 bit） 符号位决定浮点数的 阅读全文
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Yes, you can build x86 + x64 version of your VS solution in parallel.Steps:1. open your solution to build as debug + x86. No writing to any files, just building.2. open your solution to build as debug + x64. VS now will prompt you to choose another place to store the temp intellisense database (sdf 阅读全文
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One of my c# project refers to a COM module. When I built it on my new machine installed with Win7 x64, it failed to compile correctly. With diagnosis, found out the cause: the com module failed to be registered into Reg (regsvr32 /s xx.dll). I turned off UAC, but still got failure.. until making a 阅读全文