math.h

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Linking Math library to a C90 code using GCC

I would like to compile a simple C90 code utilizing math library: main.c: #include <stdlib.h> #include <stdio.h>[详细]

2023-04-03 12:29 分类：问答
C/C++ fastest cmath log operation

I\'m trying to calculate logab (and get a floating point back, not an integer). I was planning to do this as log(b)/log(a). Mathematically sp开发者_如何转开发eaking, I can use any of the cmath log fun[详细]

2023-03-19 06:24 分类：问答
Error function, erf(x), not found in math.h for visual studio 2005

It seems that cmath for visual studio 2005 does not have erf(x).I am using NIST Statistica开发者_如何学编程l Test Suite for Random and Pseudorandom Number Generators. In cephes.c\'s method, double cep[详细]

2023-03-11 17:43 分类：问答
_USE_MATH_DEFINES in C++ (VS2010)

I have got the following problem: I want to use M_PI defined in math.h. I开发者_如何学Pythonn order to do that, one should define _USE_MATH_DEFINES before including the header.[详细]

2023-02-10 08:41 分类：问答
sqrt() returning INF

Hi I\'m trying to do some calculations with long doubles and I am getting INF from sqrt(开发者_如何学编程) function.[详细]

2023-02-07 19:05 分类：问答
Where is the definition of function nanf() on linux

I am trying to look for definition and declaration of the functionnanf() - return \'Not a Number function, which is related to the floating point functionality on Linux gcc compiler environment - (gli[详细]

2023-01-29 16:43 分类：问答
How can I account for round-off errors in floating-point arithmetic for inverse trig (and sqrt) functions (in C)?

I have a fairly complicated function that takes several double values that represent two vectors in 3-space of the form (magnitude, latitude, longitude) where latitude and longitude are in radians, an[详细]

2023-01-24 17:04 分类：问答
sqrt() function not working with variable arguments [duplicate]

This question already has answers here: sqrt from math.h causes linker error "undefined reference to sqrt" only when the argument is not a constant[详细]

2023-01-12 05:51 分类：问答
When do I use fabs and when is it sufficient to use std::abs?

I assume that abs and fabs are behaving different when using math.h. But when I use just cmath and std::abs, do I ha开发者_运维问答ve to use std::fabs or fabs? Or isn\'t this defined?In C++, it\'s alw[详细]

2023-01-04 22:33 分类：问答
Why does this code sometimes return NaN?

This often returns NAN (\"Not A Number\") depending on input: 开发者_如何转开发 #define PI 3.1415f[详细]

2023-01-02 22:35 分类：问答