RosettaCodeData/Task/Nth/Modula-2/nth.mod2

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MODULE Nth;
FROM STextIO IMPORT
WriteString, WriteLn;
FROM WholeStr IMPORT
IntToStr;
PROCEDURE Suffix(N: CARDINAL; VAR OUT Destination: ARRAY OF CHAR);
VAR
NMod10, NMod100: CARDINAL;
BEGIN
NMod10 := N MOD 10;
NMod100 := N MOD 100;
IF (NMod10 = 1) AND (NMod100 <> 11) THEN
Destination := "st";
ELSIF (NMod10 = 2) AND (NMod100 <> 12) THEN
Destination := "nd";
ELSIF (NMod10 = 3) AND (NMod100 <> 13) THEN
Destination := "rd";
ELSE
Destination := "th";
END;
END Suffix;
PROCEDURE PrintImages(LoLim, HiLim: CARDINAL);
VAR
I: CARDINAL;
IString: ARRAY [0 .. 15] OF CHAR;
ISuff: ARRAY [0 .. 1] OF CHAR;
BEGIN
FOR I := LoLim TO HiLim DO
IntToStr(I, IString);
Suffix(I, ISuff);
WriteString(IString);
WriteString(ISuff);
WriteString(" ");
END;
WriteLn;
END PrintImages;
BEGIN
PrintImages( 0, 25);
PrintImages( 250, 265);
PrintImages(1000, 1025);
END Nth.