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Ingy döt Net 2013-04-11 01:07:29 -07:00
parent b83f433714
commit 68f8f3e56b
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Task/Sorting-algorithms-Bead-sort/XPL0/sorting-algorithms-bead-sort.xpl0 Normal file
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include c:\cxpl\codes;
proc BeadSort(Array, Length); \Sort Array into increasing order
int Array, Length; \Array contents range 0..31; number of items
int Row, I, J, T, C;
[Row:= Reserve(Length*4); \each Row has room for 32 beads
for I:= 0 to Length-1 do \each Row gets Array(I) number of beads
Row(I):= ~-1<<Array(I); \(beware for 80186..Pentium <<32 doesn't shift)
for J:= 1 to Length-1 do
for I:= Length-1 downto J do
[T:= Row(I-1) & ~Row(I); \up to 31 beads fall in a single pass
Row(I-1):= Row(I-1) | T; \(|=xor, !=or)
Row(I):= Row(I) | T;
];
for I:= 0 to Length-1 do \count beads in each Row
[C:= 0; T:= Row(I);
while T do
[if T&1 then C:= C+1; T:= T>>1];
Array(I):= C; \count provides sorted order
];
];
int A, I;
[A:= [3, 1, 4, 1, 25, 9, 2, 6, 5, 0];
BeadSort(A, 10);
for I:= 0 to 10-1 do [IntOut(0, A(I)); ChOut(0, ^ )];
]