help with parsing strings

[clover]

how can i type something and have playbasic do it. for example if you run this code and type circle it will draw a circle

PlayBASIC Code: [Select]

  #include "input"
myinput=newinput(0,300,"")
do
   cls
   input(myinput)
   mystring$=getinputtext(myinput)
   if instring(mystring$,"circle",0,1)
      circle x,y,20,1
      endif
   sync
   loop

but how can i get pb to draw a circle at any position i type in

[kevin]

  You'd have to pick through the string 'parsing' it.  So when you find the 'Circle' characters in a string, you'd then look at the characters following that word.  Split those characters apart and 'convert' the string fragments into numeric equivalents.    

 The best way is to tokenize the code string fragment into a numeric form and evaluate from that.


  Simple Formula Evaluation / Compilers (login required)

  Tokenize String - Simple String Lexer

[clover]

thanks kevin that's exactly what i needed to know

[kevin]

What you trying to make ?

[clover]

i want to type what i want the program to do while it's runing

[kevin]

for a debugger, a game mechanic.. what ?