truncd32(), truncd64(), truncd128() — Truncate an integer value

Standards

Standards / Extensions	C or C++	Dependencies
C/C++ DFP	both	z/OS V1.8

Format

#define __STDC_WANT_DEC_FP__
#include <math.h>

_Decimal32  truncd32(_Decimal32 x); 
_Decimal64  truncd64(_Decimal64 x);
_Decimal128 truncd128(_Decimal128 x);
_Decimal32  trunc(_Decimal32 x);      /* C++ only */
_Decimal64  trunc(_Decimal64 x);      /* C++ only */
_Decimal128 trunc(_Decimal128 x);     /* C++ only */

General description

The trunc functions round x to the integer value, in decimal floating-point format, nearest to but no larger in magnitude than x.

Notes:

To use IEEE decimal floating-point, the hardware must have the Decimal Floating-Point Facility installed.
These functions work in IEEE decimal floating-point format. See "IEEE Decimal Floating-Point" for more information.

Returned value

The trunc functions return the truncated integer value of x.

Example

⁄* CELEBT21

   This example illustrates the truncd128() function.

*⁄

#define  __STDC_WANT_DEC_FP__
#include <math.h>
#include <stdio.h>

int main(void)
{
   _Decimal128 x = 123456789.40DL, y;

   y = truncd128(x);

   printf("The result of truncd128(%DDf) is %DDf\n", x, y);
}

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