Commit | Line | Data |
---|---|---|
af2ef71d JB |
1 | #include <stdio.h> |
2 | ||
3 | void displayMenuEntry(int num, const char* option) { | |
4 | printf("%d - %s\n", num, option); | |
5 | } | |
6 | ||
7 | void displayMenu() { | |
8 | displayMenuEntry(1, "Addition"); | |
9 | displayMenuEntry(2, "Soustraction"); | |
10 | displayMenuEntry(3, "Multiplication"); | |
11 | displayMenuEntry(4, "Division"); | |
12 | displayMenuEntry(5, "Puissance"); | |
13 | displayMenuEntry(6, "Quitter"); | |
14 | } | |
15 | ||
16 | int prompt(const char* msg) { | |
17 | puts(msg); | |
18 | int value; | |
19 | scanf("%d", &value); | |
20 | return value; | |
21 | } | |
22 | ||
23 | int promptUserChoice() { | |
24 | int choice; | |
25 | displayMenu(); | |
26 | return choice = prompt("Veuillez saisir un choix d'operation ?"); | |
27 | } | |
28 | ||
29 | int doAddition(int val1, int val2) { | |
30 | return val1 + val2; | |
31 | } | |
32 | ||
33 | int doSubstraction(int val1, int val2) { | |
fbfa3f78 | 34 | return val1 - val2; |
af2ef71d JB |
35 | } |
36 | ||
37 | int doMultiplication(int val1, int val2) { | |
38 | return val1 * val2; | |
39 | } | |
40 | ||
41 | int doDivision(int val1, int val2) { | |
42 | if (val2 == 0) { | |
43 | printf("Division par zero !\n"); | |
44 | //FIXME: I'm not very fond of this convention ... | |
45 | return 0; | |
46 | } else { | |
47 | return val1 / val2; | |
48 | } | |
49 | } | |
50 | ||
51 | int doPuissance(int base, int expo) { | |
52 | int power = 1; | |
53 | for (int iter = 0; iter < expo; iter++) { | |
fbfa3f78 | 54 | power *= base; |
af2ef71d JB |
55 | } |
56 | return power; | |
57 | } | |
58 | ||
59 | int doPuissanceSmart(int base, int expo) { | |
60 | int power; | |
61 | if (expo == 1) { | |
fbfa3f78 | 62 | power = base; |
af2ef71d | 63 | } else if (expo % 2 == 0) { |
fbfa3f78 | 64 | power = doPuissanceSmart(base*base, expo/2); |
af2ef71d JB |
65 | } else { |
66 | power = base*doPuissanceSmart(base*base,(expo-1)/2); | |
67 | } | |
68 | return power; | |
69 | } | |
70 | ||
71 | int doPuissanceSmartIter(int base, int expo) { | |
72 | int power = 1; | |
73 | while (expo > 1) { | |
74 | if (expo % 2 == 0) { | |
75 | expo /= 2; | |
76 | } else { | |
fbfa3f78 JB |
77 | power *= base; |
78 | expo = (expo - 1) / 2; | |
af2ef71d JB |
79 | } |
80 | base *= base; | |
81 | } | |
82 | return power * base; | |
83 | } | |
84 | ||
85 | int doOperation(int selection, int val1, int val2) { | |
86 | int op_result; | |
87 | switch (selection) { | |
88 | case 1: | |
fbfa3f78 | 89 | op_result = doAddition(val1, val2); |
af2ef71d JB |
90 | break; |
91 | case 2: | |
fbfa3f78 | 92 | op_result = doSubstraction(val1, val2); |
af2ef71d JB |
93 | break; |
94 | case 3: | |
fbfa3f78 | 95 | op_result = doMultiplication(val1, val2); |
af2ef71d JB |
96 | break; |
97 | case 4: | |
fbfa3f78 | 98 | op_result = doDivision(val1, val2); |
af2ef71d JB |
99 | break; |
100 | case 5: | |
101 | op_result = doPuissanceSmartIter(val1, val2); | |
102 | break; | |
103 | case 6: | |
104 | break; | |
105 | default: | |
106 | puts("Faire un choix entre 1 et 6"); | |
107 | } | |
108 | return op_result; | |
109 | } | |
110 | ||
111 | /* int promptValue(const char* invite) { | |
112 | int input; | |
113 | return input = prompt(invite); | |
114 | } */ | |
115 | ||
116 | void promptValue(const char* invite, int* value) { | |
fbfa3f78 | 117 | puts(invite); |
af2ef71d JB |
118 | scanf("%d", value); |
119 | } | |
120 | ||
121 | void promptBothValues(int* val1, int* val2) { | |
122 | promptValue("Veuillez saisir la premiere valeur", val1); | |
123 | promptValue("Veuillez saisir la deuxieme valeur", val2); | |
124 | } | |
125 | ||
126 | int main() { | |
127 | int choiceresult, value1, value2, result; | |
128 | for (;;) { | |
129 | choiceresult = promptUserChoice(); | |
fbfa3f78 | 130 | if (choiceresult == 6) break; |
af2ef71d JB |
131 | promptBothValues(&value1, &value2); |
132 | result = doOperation(choiceresult, value1, value2); | |
133 | printf("Le resultat est %d\n", result); | |
134 | printf("\n"); | |
135 | } | |
136 | } |