mirror of
https://github.com/AdaCore/why3.git
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3671864507
- New examples using the new syntax (+=, ...) - New examples using the new methods (.pop(), .append(), ...) - Update old examples with assignement operators (+=, ...)
29 lines
395 B
Python
29 lines
395 B
Python
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print("la multiplication dite russe")
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a = int(input("entrez a : "))
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b = int(input("entrez b : "))
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p = a
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q = b
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if q < 0:
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p = -a
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q = -b
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#@ assert q >= 0
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r = 0
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while q > 0:
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#@ invariant 0 <= q
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#@ invariant r + p * q == a * b
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#@ variant q
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print(p, q, r)
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if q % 2 == 1:
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r += p
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p += p
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q //= 2
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print(p, q, r)
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print("a * b =", r)
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#@ assert r == a * b
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