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31 lines
532 B
31 lines
532 B
! Plot a histogram from a stream of nonzero integers.
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let
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const mid ~ 40;
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var n : Integer;
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proc putmany (c : Char, n : Integer) ~
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let
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var i : Integer
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in
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begin
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i := 0;
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while i < n do
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begin put (c); i := i + 1 end
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end;
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proc makenonnegative (var n : Integer) ~
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if n < 0 then n := 0 - n else
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in
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begin
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getint (var n); geteol ();
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while n \= 0 do
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begin
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putmany (' ', if n > 0 then mid else mid + n);
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makenonnegative (var n);
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putmany ('+', n);
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puteol ();
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getint (var n); geteol ()
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end
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end
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