Répétition et Binaire
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Exercice N°1 :
| Enoncé | Exemple : |
Écrire une
fonction python appelée nb_repetitions qui prend en
paramètres un |
Exemples
: >>> nb_repetitions(5,[2,5,3,5,6,9,5]) 3 >>> nb_repetitions('A',[ 'B', 'A', 'B', 'A', 'R']) 2 >>> nb_repetitions(12,[1, '! ',7,21,36,44]) 0 |
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| REPONSE |
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L=[2,5,3,5,6,9,5] J=[ 'B', 'A', 'B', 'A', 'R'] K=[1, '! ',7,21,36,44] def nb_repetitions(a,L): k=0 for elt in L: if elt==a: k=k+1 return k,L print(nb_repetitions(5,L)) (3, [2, 5, 3, 5, 6, 9, 5]) print(nb_repetitions('A',J)) (2, ['B', 'A', 'B', 'A', 'R']) print(nb_repetitions(12,K)) (0, [1, '! ', 7, 21, 36, 44]) |
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Exercice
N°2 :
| Chercher : | |
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Pour rappel, la conversion d’un nombre
entier positif en binaire peut s’effectuer à l’aide Voici une fonction python basée sur
la méthode des divisions successives permettant de def binaire(a): bin_a = str(...) a = a // 2 while a ... : bin_a = ...(a%2) + ... a = ... return bin_a
Compléter la fonction binaire. >>> binaire(0) '0' >>> binaire(77) '1001101’ |
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REPONSE
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| Programme |
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def binaire(a):
bin_a =str(a%2) a = a // 2 while a !=0: bin_a =str(a%2) +bin_a a = a//2 return bin_a
for i in range(100): print(i,' = ',binaire(i)) |
| RESULTATS | 100 convertions | |
|---|---|---|
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0 = 0 1 = 1 2 = 10 3 = 11 4 = 100 5 = 101 6 = 110 7 = 111 8 = 1000 9 = 1001 10 = 1010 11 = 1011 12 = 1100 13 = 1101 14 = 1110 15 = 1111 16 = 10000 17 = 10001 18 = 10010 19 = 10011 20 = 10100 21 = 10101 22 = 10110 23 = 10111 24 = 11000 25 = 11001 26 = 11010 27 = 11011 28 = 11100 29 = 11101 30 = 11110 31 = 11111 32 = 100000 |
33 = 100001 34 = 100010 35 = 100011 36 = 100100 37 = 100101 38 = 100110 39 = 100111 40 = 101000 41 = 101001 42 = 101010 43 = 101011 44 = 101100 45 = 101101 46 = 101110 47 = 101111 48 = 110000 49 = 110001 50 = 110010 51 = 110011 52 = 110100 53 = 110101 54 = 110110 55 = 110111 56 = 111000 57 = 111001 58 = 111010 59 = 111011 60 = 111100 61 = 111101 62 = 111110 63 = 111111 64 = 1000000 65 = 1000001 66 = 1000010 |
67 = 1000011 68 = 1000100 69 = 1000101 70 = 1000110 71 = 1000111 72 = 1001000 73 = 1001001 74 = 1001010 75 = 1001011 76 = 1001100 77 = 1001101 78 = 1001110 79 = 1001111 80 = 1010000 81 = 1010001 82 = 1010010 83 = 1010011 84 = 1010100 85 = 1010101 86 = 1010110 87 = 1010111 88 = 1011000 89 = 1011001 90 = 1011010 91 = 1011011 92 = 1011100 93 = 1011101 94 = 1011110 95 = 1011111 96 = 1100000 97 = 1100001 98 = 1100010 99 = 1100011 |