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Revision 1262, 0.8 kB
(checked in by mswat, 2 years ago)
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| 4 | PROGRAM EUCLID |
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| 5 | PRINT *, 'A?' |
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| 6 | READ *, NA |
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| 7 | IF (NA.LE.0) THEN |
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| 8 | PRINT *, 'A must be a positive integer.' |
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| 9 | STOP |
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| 10 | END IF |
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| 11 | PRINT *, 'B?' |
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| 12 | READ *, NB |
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| 13 | IF (NB.LE.0) THEN |
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| 14 | PRINT *, 'B must be a positive integer.' |
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| 15 | STOP |
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| 16 | END IF |
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| 17 | PRINT *, 'The GCD of', NA, ' and', NB, ' is', NGCD(NA, NB), '.' |
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| 18 | STOP |
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| 19 | END |
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| 20 | |
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| 21 | FUNCTION NGCD(NA, NB) |
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| 22 | IA = NA |
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| 23 | IB = NB |
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| 24 | 1 IF (IB.NE.0) THEN |
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| 25 | ITEMP = IA |
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| 26 | IA = IB |
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| 27 | IB = MOD(ITEMP, IB) |
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| 28 | GOTO 1 |
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| 29 | END IF |
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| 30 | NGCD = IA |
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| 31 | RETURN |
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| 32 | END |
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