Using the 'solve()' command in a program

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Using the 'solve()' command in a program

Hart (guest) 04 Nov 2013 05:02

I have two questions, I understand mostly how coding works but i'm unfamiliar with this language and pretty new to it.
1)How do you get a program to use the solve() function?
2)How would you work the if/then statement in this case.
What the program is doing is just solving 3 equations and giving the 3 answers. I'll either know the variables in the equation, or the numbers that the equation equals and will need to solve for the unknown variables inside the equation.
The error I get is "Error:Argument must be a variable name" and with my if/then statement, if i don't choose "A" then I get "A test did not resolve to TRUE or FALSE"
-Hopefully this is clear….if not I will try to clarify a bit! Thanks!

*defined all variables as Local*
Request "What would you like to solve for? A=xyz, B=uvw", s

If s=A then
Request "What is D?", D
Request "What is E?", E
Request "What is F?", F
setMode(5,2)
Solve(x=D*equation1 and y=E*equation2 and z=F*equation3, x,y,z)
Disp "x=",x
Disp "y=",y
Disp "z=",z
Else
Request "What is G?", G
Request "What is H?", H
Request "What is I?", I
setMode(5,2)
Solve(G=u*equation1 and H=v*equation2 and I=w*equation3, u,v,w)
Disp "u=",u
Disp "v=",v
Disp "w=",w
EndIf

Re: Using the 'solve()' command in a program

Xeda Elnara 05 Nov 2013 13:17

One thing that will be very useful for you in programs such as these is the # (indirection) token. For example, if you wanted to do almost the same thing as the zeroes function (this is just an example), the user might do:

mysolve(potato²-2potato+potato,potato)

and then the code for mysolve() might be:

mysolve(func,var)
Func
Local func,var
return solve(func=0,#string(var))
EndFunc

I haven't done much Nspire or 68k BASIC coding in a while, so the code might need to be tweaked to actually work. Hopefully some of it helps, though!

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Last edited on 05 Nov 2013 13:17 by Xeda Elnara Show more