Top "Cmath" questions

Definitions of sqrt, sin, cos, pow etc. in cmath

Are there any definitions of functions like sqrt(), sin(), cos(), tan(), log(), exp() (these from math.h/cmath) available ? I …

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cmath.h and compile errors

I used to work with math.h without any problem. Now, I use an external library which itself has a …

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Why are some functions in <cmath> not in the std namespace?

I am developing a project which works with multiple arithmetic types. So I made a header, where the minimal requirements …

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Constexpr Math Functions

So noticed from this page that none of the math functions in c++11 seems to make use of constexpr, whereas …

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How to fix "error: call to 'abs' is ambiguous"

I'm running a simple C++ program from HackerRank about pointers and it works fine on the website. However, when I …

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Why is isnan ambiguous and how to avoid it?

Since isnan can be either a macro (in C++98) or a function defined in namespace std (in C++11), an obvious (…

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Using pow() gives errors

Please have a look at the following code #include <iostream> #include <iomanip> #include <cmath> …

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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 …

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Rounding positive/negative numbers to nearest "whole" number

I'm trying to round numbers derived from cmath's divide function to a "whole" number, the results often being negative due …

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How can I work around the fact that in C++, sin(M_PI) is not 0?

In C++, const double Pi = 3.14159265; cout << sin(Pi); // displays: 3.58979e-009 it SHOULD display the number zero I understand …

c++ trigonometry cmath