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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/CUSIP/ALGOL-W/cusip.alg Normal file
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begin % returns true if cusip is a valid CUSIP code %
logical procedure isCusip ( string(9) value cusip ) ;
begin
% returns the base 39 digit corresponding to a character of a CUSIP code %
integer procedure cusipDigit( string(1) value cChar ) ;
if cChar >= "0" and cChar <= "9" then ( decode( cChar ) - decode( "0" ) )
else if cChar >= "A" and cChar <= "Z" then ( decode( cChar ) - decode( "A" ) ) + 10
else if cChar = "*" then 36
else if cChar = "@" then 37
else if cChar = "#" then 38
else % invalid digit % -999 ;
integer checkDigit, sum;
checkDigit := cusipDigit( cusip( 8 // 1 ) );
for cPos := 1 until 8 do begin
integer digit;
digit := cusipDigit( cusip( ( cPos - 1 ) // 1 ) );
if not odd( cPos ) then digit := digit * 2;
sum := sum + ( digit div 10 ) + ( digit rem 10 )
end for_cPos ;
( ( 10 - ( sum rem 10 ) ) rem 10 ) = checkDigit
end isCusip ;
begin % task test cases %
procedure testCusip ( string(9) value cusip ) ;
write( s_w := 0, cusip, if isCusip( cusip ) then " valid" else " invalid" );
testCusip( "037833100" );
testCusip( "17275R102" );
testCusip( "38259P508" );
testCusip( "594918104" );
testCusip( "68389X106" );
testCusip( "68389X105" )
end testCases
end.