109 lines
2.4 KiB
Text
109 lines
2.4 KiB
Text
program Four_is_magic;
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{$APPTYPE CONSOLE}
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uses
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System.SysUtils;
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// https://rosettacode.org/wiki/Number_names#Delphi
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const
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smallies: array[1..19] of string = ('one', 'two', 'three', 'four', 'five',
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'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen',
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'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen');
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tens: array[2..9] of string = ('twenty', 'thirty', 'forty', 'fifty', 'sixty',
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'seventy', 'eighty', 'ninety');
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function domaxies(number: int64): string;
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const
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maxies: array[0..5] of string = (' thousand', ' million', ' billion',
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' trillion', ' quadrillion', ' quintillion');
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begin
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domaxies := '';
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if number >= 0 then
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domaxies := maxies[number];
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end;
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function doHundreds(number: int64): string;
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begin
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Result := '';
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if number > 99 then
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begin
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Result := smallies[number div 100];
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Result := Result + ' hundred';
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number := number mod 100;
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if number > 0 then
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Result := Result + ' and ';
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end;
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if number >= 20 then
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begin
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Result := Result + tens[number div 10];
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number := number mod 10;
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if number > 0 then
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Result := Result + '-';
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end;
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if (0 < number) and (number < 20) then
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Result := Result + smallies[number];
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end;
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function spell(number: int64): string;
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var
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scaleFactor: int64;
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maxieStart, h: int64;
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begin
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if number = 0 then
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exit('zero');
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scaleFactor := 1000000000000000000;
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Result := '';
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if number < 0 then
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begin
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number := -number;
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Result := 'negative ';
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end;
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maxieStart := 5;
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if number < 20 then
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exit(smallies[number]);
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while scaleFactor > 0 do
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begin
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if number > scaleFactor then
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begin
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h := number div scaleFactor;
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Result := Result + doHundreds(h) + domaxies(maxieStart);
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number := number mod scaleFactor;
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if number > 0 then
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Result := Result + ', ';
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end;
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scaleFactor := scaleFactor div 1000;
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dec(maxieStart);
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end;
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end;
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//****************************************************\\
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const
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numbers: array of Int64 = [0, 4, 6, 11, 13, 75, 100, 337, -164, int64.MaxValue];
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function fourIsMagic(n: int64): string;
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var
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s: string;
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begin
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s := spell(n);
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s[1] := upcase(s[1]);
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var t := s;
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while n <> 4 do
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begin
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n := s.Length;
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s := spell(n);
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t := t + ' is ' + s + ', ' + s;
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end;
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t := t + ' is magic.';
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exit(t);
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end;
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begin
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// writeln(spell(4));
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for var n in numbers do
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writeln(fourIsMagic(n));
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readln;
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end.
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