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Particular
routines for INTEGERobjects |
Particular routines for INTEGERobjects
The make, select, change, build routines are the basic
routines, let us now look at some particular ones: The following
routine allows to evaluate the number of digits:
- Its NAME is intlog,
- and the SYNOPSIS is INT intlog(OP integerobject).
- The DESCRIPTION: It computes the number of digits of the
INTEGERobject. The result is the return value, which is always
>0.
For the generation of random INTEGERobjects, look at the following
codefragment:
...
INT i;
...
scan(INTEGER,upper);
scan(INTEGER,lower);
for (i=0L;i<1000L;i++)
{
random_integer(result,lower,upper);
println(result);freeself(result);
}
...
which prints 1000 random numbers between the upper and lower bound.
Because this is a lowlevel routine, you have to free the result
object, before you call the routine. The description of this
routine for the generation of random integers reads as
follows:
- The NAME: random_integer
- The SYNOPSIS:
| INT random_integer(OP
result,lower,upper). |
- The DESCRIPTION: It computes a random INTEGERobject, between
upper and lower bound, which both must be INTEGERobjects. There is
no check, whether these are INTEGERobjects. If lower is NULL, then
the default is 0. if upper is NULL, the default is lower+10
- The RETURN: the returnvalue is OK or ERROR if an error
occured
- Possible BUGS: as the random routine is not well implemented on
most systems, random_integer shows sometimes very non random
results.
There is also a routine for testing the implementation of
INTEGERobjects:
- NAME: test_integer
- SYNOPSIS: INT test_integer()
- DESCRIPTION: It tests the implementation of
INTEGERobjects.
harald.fripertinger "at" uni-graz.at, May 26,
2011
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Particular
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