32bit-64bit

问题 I was wondering whether the compiler would use different padding on 32-bit and 64-bit systems, so I wrote the code below in a simple VS2019 C++ console project: struct Z { char s; __int64 i; }; int main() { std::cout << sizeof(Z) <<"\n"; } What I expected on each "Platform" setting: x86: 12 X64: 16 Actual result: x86: 16 X64: 16 Since the memory word size on x86 is 4 bytes, this means it has to store the bytes of i in two different words. So I thought the compiler would do padding this way:

问题 Lets say I have the following four variables: player1X, player1Y, player2X, player2Y. These have, for example, respectively the following values: 5, 10, 20, 12. Each of these values is 8 bits at max and I want to store them into one integer (32 bits), how can I achieve this? By doing this, I want to create a dictionary, keeping count of how often certain states have happened in the game. For example, 5, 10, 20, 12 is one state, 6, 10, 20, 12 would be another. 回答1: You can use BitConverter To

问题 Lets say I have the following four variables: player1X, player1Y, player2X, player2Y. These have, for example, respectively the following values: 5, 10, 20, 12. Each of these values is 8 bits at max and I want to store them into one integer (32 bits), how can I achieve this? By doing this, I want to create a dictionary, keeping count of how often certain states have happened in the game. For example, 5, 10, 20, 12 is one state, 6, 10, 20, 12 would be another. 回答1: You can use BitConverter To

问题 Lets say I have the following four variables: player1X, player1Y, player2X, player2Y. These have, for example, respectively the following values: 5, 10, 20, 12. Each of these values is 8 bits at max and I want to store them into one integer (32 bits), how can I achieve this? By doing this, I want to create a dictionary, keeping count of how often certain states have happened in the game. For example, 5, 10, 20, 12 is one state, 6, 10, 20, 12 would be another. 回答1: You can use BitConverter To

问题 I would like to know when do we need to place a file under C:\Windows\System32 or C:\Windows\SysWOW64, on a 64-bits windows system. I had two DLL's, one for 32-bit, one for 64-bit. Logically, I thought I'd place the 32-bit DLL under C:\Windows\System32, and the 64-bit DLL under C:\Windows\SysWOW64. To my surprise, it's the other way around ! The 32 -bit one goes into C:\Windows\SysWOW 64 , and the 64 -bit DLL goes into C:\Windows\System 32 . Very confusing stuff. What's the reason behind this

问题 I have two computers, both running 64-bit Windows 7. One machine has python 32-bit, one is running python 64-bit. Both machines have 8GB of RAM. I'm using BeautifulSoup to scrape a webpage, but I've been running into issues on my python64 machine. I've been able to figure out that the output of my len(str(BeautifulSoup(request.get(http://www.sampleurl.com).text))) in 64bit is only returning 92520 characters but on the same, static, site on my python32-bit machine, it's returning 135000

问题 To write a complete program in 32-bit assembly language using MASM one may start like this, .686 .model flat,c .stack 100h .data number sdword 5 .code main proc mov eax,number ret main endp end main whereas in 64-bit mode the code is written as .data number sdword 5 .code main proc mov eax,number ret main endp end The settings are set to default which led to occur an error while assembling in a 64-bit mode not because the platform is set to Win32, but instead the default entry point

问题 I'm porting some code from 32 bit to 64 bit, and ensuring the answers are the same. In doing so, I noticed that atan2f was giving different results between the two. I created this min repro: #include <stdio.h> #include <math.h> void testAtan2fIssue(float A, float B) { float atan2fResult = atan2f(A, B); printf("atan2f: %.15f\n", atan2fResult); float atan2Result = atan2(A, B); printf("atan2: %.15f\n", atan2Result); } int main() { float A = 16.323556900024414; float B = -5.843180656433105;

问题 I am trying to learn the C Calling conventions in assembly language. To do so, I made a simple program using the puts function from the C standard library. I assembled and linked the program with the following commands :- nasm -f elf file.asm gcc -m32 file.asm -o file The nasm produces the right object file but when running the gcc to link the object files, I am getting error. Looking at the error I have figured it out that I don't have the 32 bit version of glibc on my system. How can I

问题 I'm trying to run a script I wrote on my Raspberry Pi Zero, but I keep getting the error OverflowError: timestamp out of range for platform time_t . I'm relatively certain it's something with the 32-bit ARM architecture of the pi, but I can't seem to figure out a workaround. Here's the traceback: File "twitter.py", line 37, in <module> t.run.Search(c) File "/home/pi/.local/lib/python3.7/site-packages/twint/run.py", line 288, in Search run(config, callback) File "/home/pi/.local/lib/python3.7