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+--- Thread: Invalid Input for this program (/thread-18062.html)
Invalid Input for this program - kingschool9 - 02-21-2022 05:18 AM
Ive been trying to add some functions to my calculator one of which is a quadratic solver. My code is:
```
EXPORT quadratic(A,B,C)
BEGIN
//Error: Pinpointed to be the - sign in the square root
RETURN [(-B+√((B^2)-4*A*C))/(2*A),(-B-√((B^2)-4*A*C))/(2*A)];
END;
```
It's quite simple but it fails. Checking the code, there are no syntax errors, but running it with quadratic(5,6,7) would give Error: Invalid input. I managed to debug and find the problem at the - sign under the square root. Any help would be appreciated
RE: Invalid Input for this program - Joe Horn - 02-21-2022 01:47 PM
Press Shift Home (Settings), left-cursor twice, and then press [+] to turn on the option to "Allow complex output from real input". This will allow your Prime to calculate the square roots of negative values.
RE: Invalid Input for this program - kingschool9 - 02-21-2022 08:27 PM
(02-21-2022 01:47 PM)Joe Horn Wrote: Press Shift Home (Settings), left-cursor twice, and then press [+] to turn on the option to "Allow complex output from real input". This will allow your Prime to calculate the square roots of negative values.
Thanks for the help. I had managed to actually fix my problem before this thread got approved by changing sqrt to CAS.sqrt which was able to solve the problem but I just now also enabled complex output as you mentioned. Thanks