floating-point-conversion

问题 I understand this question is oddly phrased, so let me explain with 2 examples. Example 1 The code below turns the series of values [64, 176, 0, 86, 68, 97, 136, 8] into the float 4096.336980910979 . (new DataView(new Uint8Array([64, 176, 0, 86, 68, 97, 136, 8]).buffer)).getFloat64(); /*Output 4096.336980910979*/ How do I reverse it to get the series of values [64, 176, 0, 86, 68, 97, 136, 8] when I input the float 4096.336980910979 ? Example 2: The code below turns the series of values [70,

问题 I'm fairly new to Lua. While testing I discovered #INF / #IND . However, I can't find a good reference that explains it. What are #INF , #IND , and similar (such as negatives) and how do you generate and use them? 回答1: #INF is infinite, #IND is NaN. Give it a test: print(1/0) print(0/0) Output on my Windows machine: 1.#INF -1.#IND As there's no standard representation for these in ANSI C, you may get different result. For instance: inf -nan 回答2: Expanding @YuHao already good answer. Lua does

问题 I'm fairly new to Lua. While testing I discovered #INF / #IND . However, I can't find a good reference that explains it. What are #INF , #IND , and similar (such as negatives) and how do you generate and use them? 回答1: #INF is infinite, #IND is NaN. Give it a test: print(1/0) print(0/0) Output on my Windows machine: 1.#INF -1.#IND As there's no standard representation for these in ANSI C, you may get different result. For instance: inf -nan 回答2: Expanding @YuHao already good answer. Lua does

问题 I got these GCC flags from the GNU GCC compiler Manual. But when I tried to use those flags ( -mpc32 , -mpc64 and -mpc80 ) I couldn't observe the behavior. So I need help on how to use these flags with a sample code. sample code I tried: test.cpp #include<stdio.h> #include<iomanip> #include<math.h> int main() { double weight = 1.0f; double roiSize = 137.142364501953125f; double thresholdValue = 5400.0f; double alpha = weight / (roiSize * thresholdValue * thresholdValue); std::cout<<std:

问题 I got these GCC flags from the GNU GCC compiler Manual. But when I tried to use those flags ( -mpc32 , -mpc64 and -mpc80 ) I couldn't observe the behavior. So I need help on how to use these flags with a sample code. sample code I tried: test.cpp #include<stdio.h> #include<iomanip> #include<math.h> int main() { double weight = 1.0f; double roiSize = 137.142364501953125f; double thresholdValue = 5400.0f; double alpha = weight / (roiSize * thresholdValue * thresholdValue); std::cout<<std:

问题 I got these GCC flags from the GNU GCC compiler Manual. But when I tried to use those flags ( -mpc32 , -mpc64 and -mpc80 ) I couldn't observe the behavior. So I need help on how to use these flags with a sample code. sample code I tried: test.cpp #include<stdio.h> #include<iomanip> #include<math.h> int main() { double weight = 1.0f; double roiSize = 137.142364501953125f; double thresholdValue = 5400.0f; double alpha = weight / (roiSize * thresholdValue * thresholdValue); std::cout<<std:

问题 I got these GCC flags from the GNU GCC compiler Manual. But when I tried to use those flags ( -mpc32 , -mpc64 and -mpc80 ) I couldn't observe the behavior. So I need help on how to use these flags with a sample code. sample code I tried: test.cpp #include<stdio.h> #include<iomanip> #include<math.h> int main() { double weight = 1.0f; double roiSize = 137.142364501953125f; double thresholdValue = 5400.0f; double alpha = weight / (roiSize * thresholdValue * thresholdValue); std::cout<<std:

问题 I got these GCC flags from the GNU GCC compiler Manual. But when I tried to use those flags ( -mpc32 , -mpc64 and -mpc80 ) I couldn't observe the behavior. So I need help on how to use these flags with a sample code. sample code I tried: test.cpp #include<stdio.h> #include<iomanip> #include<math.h> int main() { double weight = 1.0f; double roiSize = 137.142364501953125f; double thresholdValue = 5400.0f; double alpha = weight / (roiSize * thresholdValue * thresholdValue); std::cout<<std:

问题 I am writing a marshaling layer to automatically convert values between different domains. When it comes to floating point values this potentially means converting values from one floating point format to another. However, it seems that almost every modern system is using IEEE754, so I'm wondering whether it's actually worth generalising to allow other formats, or just manage marshaling between different IEEE754 formats. Does anyone know of any commonly used floating point formats other than

问题 I am writing a marshaling layer to automatically convert values between different domains. When it comes to floating point values this potentially means converting values from one floating point format to another. However, it seems that almost every modern system is using IEEE754, so I'm wondering whether it's actually worth generalising to allow other formats, or just manage marshaling between different IEEE754 formats. Does anyone know of any commonly used floating point formats other than