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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Say, I have a integer like 10101 , I would like to unset the third bit to get 10001 ; if I have 10001 , I will still get 10001 ; how can I achieve it? unset(int i, int j) int i= 10101 or 10000 int j = 00100 回答1: Assuming that you are indexing bits from the right, this should work to unset a particular bit in value : int mask = 1 You can set the bit using similar code: value |= mask; where mask is as before. (This assumes that bit indexing starts at 0.) 回答2: To clear or unset a bit Use the bitwise AND operator (&) to clear a bit. number &= ~

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I learned yesterday that in DelphiXE using the compiler directive: {$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE} you can access/use 4GB address space on 64bit computers even though DelphiXE compiler produces a 32bit code. I tried today DelphiXE program on 4GB machine with Windows7 and after starting the program I really get the following result: Kbytes of physical memory: ~4.000.000KB Kbytes of free physical memory: ~3.200.000KB Percent of Memory in use: ~20% Kbytes of virtual address space: ~4.000.000KB¨ Kbytes of free virtual address space:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have just installed CentOS 6 64bit version, I'm trying to install a 32-bit application on a 64-bit machine and got this error: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory I'm new to linux. How do I resolve this? 回答1: You're on a 64-bit system, and don't have 32-bit library support installed. To install (baseline) support for 32-bit executables Most desktop Linux systems in the Fedora/Red Hat family: pkcon install glibc.i686 Possibly some desktop Debian/Ubuntu systems?: pkcon install ia32-libs Fedora or newer Red Hat,

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: The following is an excerpt from a code sample in K&R's The C Programming Language (section 8.7): typedef long Align; union header { struct { union header *ptr; unsigned size; } s; Align x; }; typedef union header Header; And here is the explanatory excerpt: To simplify alignment, all blocks are multiples of the header size, and the header is aligned properly. This is achieved by a union that contains the desired header structure and an instance of the most restrictive type, which we have arbitrarily made a long. So, as I understand it, the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Does {$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE} have any effects on 64-bit delphi applications? 回答1: It has no effect at all. All 64 bit processes are automatically decreed to be large address aware. 文章来源: {$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE} in 64 bit delphi application

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a WPF app that uses Flash10c.ocx developed on a 32 bit machine. I didn't have to register the ocx on my dev machine, I just installed the latest flash, added a reference and started coding. When testing on a 64 bit system I get ye old "Class not registered" which I think mean I need to regsvr the ocx. Is it Ok to just copy the 32 bit ocx (I'm pretty sure its 32 bit as its located in C:\Windows\System32\Macromed on the dev system) to a 64 bit system and register it? Update: regsvr32 /i flash10c.ocx errors out with "The module flash10c

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: The theoretical maximum heap value that can be set with -Xmx in a 32-bit system is of course 2^32 bytes, but typically (see: Understanding max JVM heap size - 32bit vs 64bit ) one cannot use all 4GB. For a 64-bit JVM running in a 64-bit OS on a 64-bit machine, is there any limit besides the theoretical limit of 2^64 bytes or 16 exabytes? I know that for various reasons (mostly garbage collection), excessively large heaps might not be wise , but in light of reading about servers with terrabytes of RAM, I'm wondering what is possible . 回答1: If

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: i'm having this problem: i'm runing pythonbrew to get python2.7, and so i re-compiled mod_wsgi to use the 2.7 python. to that end, i followed this tutorial: code.google.com/p/modwsgi/wiki/QuickInstallationGuide which involved downloading the file - there is a tar.gz file i get - and then "configuring it" with ./configure --with-python=/home/bharal/.pythonbrew/pythons/Python-2.7.2/bin/python --enable-shared now i'm assuming this is the right place to attach for my python - the value for with-python above is just the response i get to a which

This question already has answers here : How do I get bit-by-bit data from an integer value in C? (8 answers) Possible Duplicate: how to get bit by bit data from a integer value in c? I have a 8-bit byte and I want to get a bit from this byte, like getByte(0b01001100, 3) = 1 Firstoff, 0b prefix is not C but a GCC extension of C. To get the value of the bit 3 of an uint8_t a , you can use this expression: ((a >> 3) & 0x01) which would be evaluated to 1 if bit 3 is set and 0 if bit 3 is not set. First of all C 0b01... doesn't have binary constants, try using hexadecimal ones. Second: uint8_t

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm working on Matlab 64-bits R2011b, and I have to use a 32-bits version (I have R2010b installed) to command a hardware (32-bit dll). For that, I created a COM server with actxserver() and it works. However, whenever a function takes time in the 32-bit session, the 64-bit session becomes 'busy' and nothing works anymore until completion. I simplified my problem in the script below : if you have two Matlab versions installed, you can try my code and see my problem. In a few words : one button starts a timer that simply shows the