Standards / Extensions | C or C++ | Dependencies |
---|---|---|
C/C++ DFP |
both | z/OS® V1.10 |
#define __STDC_WANT_DEC_FP__
#include <math.h>
_Decimal32 acoshd32(_Decimal32 x);
_Decimal64 acoshd64(_Decimal64 x);
_Decimal128 acoshd128(_Decimal128 x);
_Decimal32 acosh(_Decimal32 x); /* C++ only */
_Decimal64 acosh(_Decimal64 x); /* C++ only */
_Decimal128 acosh(_Decimal128 x); /* C++ only */
The acosh functions compute the (nonnegative) arc hyperbolic cosine of x. A domain error occurs for arguments less than 1.
These functions work in IEEE decimal floating-point format. See IEEE decimal floating-point for more information.
If successful, the function returns the hyperbolic arccosine of its argument x.
If x is less than 1.0, the function sets errno to EDOM and returns NaNQ.
CELEBA12
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This example illustrates the acoshd64() function.
*⁄
#define __STDC_WANT_DEC_FP__
#include <math.h>
#include <stdio.h>
int main(void)
{
_Decimal64 x, y;
x = 100.0DD;
y = acoshd64(x);
printf("acoshd64(%Df) = %Df\n", x, y);
}