Scilab Error 4 Undefined variable <function_name>

Question

hi ppl im new at Scilab, im doing a script which i send the user through menus and i'm making a function for every sub-menu. I read that functions can have 0 input parameters but it must have at least 1 output parameter. According to this i wrote this

//execution file landing menu
option='1'
while (option~=0)
   clc
   mprintf('1 - First Sub-menu')
   mprintf('2 - Second Sub-menu')
   option=input('Select the option: ', 's')
   select option
   case '1' then
      result=sub_one(),
   case '2' then
      result=sub_two(),
   else
      disp('Invalid Option!!!')
   end
end

//Function sub_one
function result=sub_one()
   option='1'
   while (option~=0)
      clc
      mprintf('1 - Do stuff')
      mprintf('2 - Do other stuff')
      option=input('Select the option: ', 's')
      select option
      case '1' then
         result=do_stuff(),
      case '2' then
         result=do_other_stuff(),
      else
         disp('Invalid Option!!!')
      end
   end
   result=0
endfunction

and i always get the error

result=sub_one(),
!--error 4 
Undefined variable: sub_one
at line      xx of exec file called by :  
exec('dir\dir\dir\file.sce', -1)

this is freaking annoying me

some experter then me?

spoorcc spoorcc · Accepted Answer · 2016-12-06T16:16:08

Scilab parses the file top to bottom, so when it is in your main part at the top of the file, sub_one does not exist yet. If you switch the order around it will work.

If you would like to retain the order in your file you can also do the following:

// Define some main function
function main()
    disp('hello from main')
    sub_one()
endfunction

// Define some sub function
function sub_one()
    disp('hello from sub_one')
endfunction

// call function main to execute
main()

Scilab Error 4 Undefined variable <function_name>

1 Answers