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Text File  |  1987-12-30  |  556 b   |  26 lines
  1. Class Main
  2. [
  3.      main | x gen |
  4.           gen <- Primes new.
  5.           (smalltalk time: [ x <- gen first.
  6.           [x < 300]
  7.                whileTrue: [ x print. x <- gen next] ] ) print.
  8. ]
  9. Class Primes
  10. | lastPrime |
  11. [
  12.      first
  13.           ^ lastPrime <- 2
  14. |
  15.      next
  16.           [lastPrime <- lastPrime + 1.
  17.            self testNumber: lastPrime]
  18.                whileFalse.
  19.           ^ lastPrime
  20. |
  21.      testNumber: n
  22.           (Primes new) do: [:x | 
  23.                (x squared > n) ifTrue: [ ^ true ].
  24.                (n \\ x = 0) ifTrue: [ ^ false ] ]
  25. ]
  26.