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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Pathological-floating-point-problems/ALGOL-68/pathological-floating-point-problems.alg Normal file
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BEGIN
# task 1 #
BEGIN
PR precision 32 PR
print( ( " 32 digit REAL numbers", newline ) );
[ 1 : 100 ]LONG LONG REAL v;
v[ 1 ] := 2;
v[ 2 ] := -4;
FOR n FROM 3 TO UPB v DO v[ n ] := 111 - ( 1130 / v[ n - 1 ] ) + ( 3000 / ( v[ n - 1 ] * v[ n - 2 ] ) ) OD;
FOR n FROM 3 TO 8 DO print( ( "n = ", whole( n, 3 ), " ", fixed( v[ n ], -22, 16 ), newline ) ) OD;
FOR n FROM 20 BY 10 TO 50 DO print( ( "n = ", whole( n, 3 ), " ", fixed( v[ n ], -22, 16 ), newline ) ) OD;
print( ( "n = 100 ", fixed( v[ 100 ], -22, 16 ), newline ) )
END;
BEGIN
PR precision 120 PR
print( ( "120 digit REAL numbers", newline ) );
[ 1 : 100 ]LONG LONG REAL v;
v[ 1 ] := 2;
v[ 2 ] := -4;
FOR n FROM 3 TO UPB v DO v[ n ] := 111 - ( 1130 / v[ n - 1 ] ) + ( 3000 / ( v[ n - 1 ] * v[ n - 2 ] ) ) OD;
print( ( "n = 100 ", fixed( v[ 100 ], -22, 16 ), newline ) )
END;
print( ( newline ) );
# task 2 #
BEGIN
print( ( "single precision REAL numbers...", newline ) );
REAL chaotic balance := exp( 1 ) - 1;
print( ( "initial chaotic balance: ", fixed( chaotic balance, -22, 16 ), newline ) );
FOR i FROM 1 TO 25 DO ( chaotic balance *:= i ) -:= 1 OD;
print( ( "25 year chaotic balance: ", fixed( chaotic balance, -22, 16 ), newline ) )
END;
BEGIN
print( ( "double precision REAL numbers...", newline ) );
LONG REAL chaotic balance := long exp( 1 ) - 1;
print( ( "initial chaotic balance: ", fixed( chaotic balance, -22, 16 ), newline ) );
FOR i FROM 1 TO 25 DO ( chaotic balance *:= i ) -:= 1 OD;
print( ( "25 year chaotic balance: ", fixed( chaotic balance, -22, 16 ), newline ) )
END;
BEGIN
PR precision 32 PR
print( ( " 32 digit REAL numbers...", newline ) );
LONG LONG REAL chaotic balance := long long exp( 1 ) - 1;
print( ( "initial chaotic balance: ", fixed( chaotic balance, -22, 16 ), newline ) );
FOR i FROM 1 TO 25 DO ( chaotic balance *:= i ) -:= 1 OD;
print( ( "25 year chaotic balance: ", fixed( chaotic balance, -22, 16 ), newline ) )
END
END