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+--- Thread: How can PPL discover that CAS is disabled (ie Exam Mode) (/thread-11035.html)
How can PPL discover that CAS is disabled (ie Exam Mode) - StephenG1CMZ - 07-11-2018 07:46 AM
In the somewhat unlikely situation where CAS is disabled but user PPL programs remain enabled in exam mode (I assume that is possible), how can a PPL program discover that CAS is disabled?
Without knowing a good example, if we assume gcd() is a fast CAS function and GCD() a slow PPL function, can I write
Code:
CASE
CASenabled : gcd() END;
PPLenabled : GCD() END;
DEFAULT my_own_gcd() END;
END:More generally, can PPL interrogate Exam mode to discover what is enabled and what is not?
How does Exam mode disable CAS - will gcd() not compile because the gcd() function is no longer defined, or is a run-time error generated?
RE: How can PPL discover that CAS is disabled (ie Exam Mode) - cyrille de brébisson - 07-12-2018 06:27 AM
Hello,
I would think that an IFERR around a known good CAS call would work...
local CasEnable= 1;
IFERR cas("1+1"); THEN CasEnable:= 0; END;
Might work. I have not tested it though...
Cyrille
RE: How can PPL discover that CAS is disabled (ie Exam Mode) - roadrunner - 07-12-2018 11:11 AM
You could check the color of one of the pixels near the top of the screen; if it's orange, you're in exam mode.
-road