The dectrunc() function

The dectrunc() function truncates a rounded decimal type number to fractional digits.

Syntax

void dectrunc(d, s)
   dec_t *d; 
   mint s;
d
A pointer to the decimal structure that contains the rounded number to truncate.
s
The number of fractional digits to which to truncate the rounded number. Use a positive integer or zero (0) for this argument.

Usage

The following table shows the sample output from dectrunc() with various inputs.
Value before truncation Value of s Truncated value
1.4 0 1.0
1.5 0 1.0
1.684 2 1.68
1.685 2 1.68
1.685 1 1.6
1.685 0 1.0