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  1. USING: formatting io kernel locals math math.functions math.parser ;
  2. IN: quadratic-example
  3.  
  4. :: quadratic-equation ( a b c -- )
  5.     a 0 =
  6.     [ "Not a quadratic equation." printf ]
  7.     [ b sq a c * 4 * - :> d 
  8.       b neg a 2 * / :> x0
  9.       d sqrt a 2 * / :> sd
  10.       d 0 =
  11.       [ x0 "x = %f\n" printf ]
  12.       [ d 0 >
  13.         [ x0 sd + x0 sd - "x1 = %f\nx2 = %f\n" printf ]
  14.         [ x0 sd + [ real-part ] [ imaginary-part ] bi "x1 = (%f, %f)\n" printf
  15.           x0 sd - [ real-part ] [ imaginary-part ] bi "x2 = (%f, %f)\n" printf ]
  16.         if
  17.       ]
  18.       if
  19.     ]
  20.     if ;
  21.  
  22. readln string>number
  23. readln string>number
  24. readln string>number
  25. quadratic-equation
  26.  
Runtime error #stdin #stdout 1.61s 164864KB
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stdin
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30
stdout
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No suitable arithmetic method
left    f
right   f
generic *
https://ideone.com/Q0Fd5
language:
Factor (factor-0.93)
created:
14 years ago
visibility:
public

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