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At 29 JAN 2009 02:12:01PM Terry Rainville wrote:

Hello All,

Arithmatic Operations Substitution

Eg Val Operator Val

  10 * 10
  10 / 10
  10 - 10 
  10 + 10

Operand=*'

Ans=Val1 Operand Val2

How do I use a variable as the operand instead of actully putting the operand in the equation.

I solved this using a Case statement but I wanted to know if there is a way to do this in one line of code where the Operand Variable just changes.

Thanks!!!


At 30 JAN 2009 12:49PM Victor Engel wrote:

I don't think there is a way to do this. I'm curious what application would benefit from such a scheme.


At 30 JAN 2009 09:11PM S Smith wrote:

One way is to write a symbolic (maybe in voc), use dictcompile, run calculatex, and then call the function name stored in a variable @functionname(x,y) etc…

I once wrote an interpreter program to do this on a screen so that you could write and resolve formulae on the fly.


At 02 FEB 2009 01:52PM Terry Rainville wrote:

Victor

Val1 Operand Val2

Would be alot easier than

Operand=*'

begin case

case Operand=*' ; Val1 * Val2
case Operand=/' ; Val1 / Val2
case Operand=+' ; Val1 + Val2
case Operand=-' ; Val1 - Val2

end case

And this could be used in any application where you want to allow arithmatic operations on Values by the users.

Point being I dont want to have to code the same line of code 4 times in a case statement when I could do it in 1 line if it is possible.


At 02 FEB 2009 04:10PM Victor Engel wrote:

I understand what you're trying to do. I just am trying to get a feel for why? The only things I can think of off the top of my head that would benefit from such a thing would be calculator or spreadsheet programs.

Anyway, I think the operators must be evaluated at compile time, not run time, which is why the functionality you want doesn't exist.

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