void decround(d, s)
   dec_t *d; 
   mint s; 

d

is a pointer to the decimal structure that contains the value to round.

s

is the number of fractional digits to round d. Use a positive integer or zero (0) for this argument.

The rounding factor is 5x10^-s-1. To round a value, the decround( ) function adds the rounding factor to a positive number or subtracts this factor from a negative number. It then truncates to s digits, as the following table shows.