cbrt, cbrtf, cbrtl

项目
06/05/2017

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Calculates the cube root.

Syntax

double cbrt(  
   double x   
);  
float cbrt(  
   float x   
);  // C++ only  
long double cbrt(  
   long double x  
);  // C++ only  
float cbrtf(  
   float x   
);  
long double cbrtl(  
   long double x  
);

Parameters

x
Floating-point value

Return Value

The cbrt functions return the cube-root of x.

Input	SEH Exception	`_matherr` Exception
± ∞, QNAN, IND	none	none

Remarks

Because C++ allows overloading, you can call overloads of cbrt that take float or long double types. In a C program, cbrt always takes and returns double.

Requirements

Function	C header	C++ header
`cbrt`, `cbrtf`, `cbrtl`	<math.h>	<cmath>

For additional compatibility information, see Compatibility.

Example

// crt_cbrt.c  
// Compile using: cl /W4 crt_cbrt.c  
// This program calculates a cube root.  
  
#include <math.h>  
#include <stdio.h>  
  
int main( void )  
{  
   double question = -64.64;  
   double answer;  
  
   answer = cbrt(question);  
   printf("The cube root of %.2f is %.6f\n", question, answer);  
}

The cube root of -64.64 is -4.013289

.NET Framework Equivalent

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

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