47 lines
700 B
Plaintext
47 lines
700 B
Plaintext
BYTE FUNC Damm(CHAR ARRAY a)
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BYTE ARRAY table=[
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0 3 1 7 5 9 8 6 4 2
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7 0 9 2 1 5 4 8 6 3
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4 2 0 6 8 7 1 3 5 9
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1 7 5 0 9 8 3 4 2 6
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6 1 2 3 0 4 5 9 7 8
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3 6 7 4 2 0 9 5 8 1
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5 8 6 9 7 2 0 1 3 4
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8 9 4 5 3 6 2 0 1 7
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9 4 3 8 6 1 7 2 0 5
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2 5 8 1 4 3 6 7 9 0]
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BYTE i,x,c
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x=0
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FOR i=1 TO a(0)
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DO
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c=a(i)
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IF c<'0 OR c>'9 THEN
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RETURN (0)
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FI
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c==-'0
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x=table(x*10+c)
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OD
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IF x=0 THEN
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RETURN (1)
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FI
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RETURN (0)
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PROC Test(CHAR ARRAY a)
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BYTE i
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Print(a) Print(" -> ")
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IF Damm(a)=1 THEN
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PrintE("valid")
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ELSE
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PrintE("invalid")
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FI
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RETURN
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PROC Main()
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Test("5724")
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Test("5727")
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Test("112946")
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Test("112949")
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RETURN
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