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Compute the cube root of a number
#include <math.h>
double cbrt ( double x );
float cbrtf ( float x );
- x
- The number whose cube root you want to calculate.
libm
Use the -l m option to
qcc
to link against this library.
The cbrt() and cbrtf()
functions compute the cube root of x.
The cube root of x. If x is NAN,
cbrt() returns NAN.
#include <stdio.h>
#include <inttypes.h>
#include <math.h>
#include <fpstatus.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(0);
}
produces the output:
The cube root of 27.000000 is 3.000000
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
sqrt()
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