Updated: October 26, 2022 |
Compute the cube root of a number
#include <math.h> double cbrt ( double x ); float cbrtf ( float x ); long double cbrtl ( long double x );
Your system requirements will determine how you should work with these libraries:
The cbrt(), cbrtf(), and cbrtl() functions compute the cube root of x.
To check for error situations, use feclearexcept() and fetestexcept(). For example:
The cube root of x.
If x is: | These functions return: | Errors: |
---|---|---|
±0.0 | x | — |
±Inf | x | — |
NaN | NaN | — |
These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.
#include <stdio.h> #include <stdlib.h> #include <math.h> int main(int argc, char** argv) { double a, b; a = 27.0; b = cbrt(a); printf("The cube root of %f is %f \n", a, b); return(EXIT_SUCCESS); }
produces the output:
The cube root of 27.000000 is 3.000000
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |