exo2/exo2.c

   1 #include <stdio.h>
   2 //#include <stdbool.h>
   3
   4 //FIXME: Comment the code !!!
   5
   6 void displayMenuEntry(int num, const char* option) {
   7     printf("%d - %s\n", num, option);
   8 }
   9
  10 void displayMenu() {
  11     displayMenuEntry(1, "Addition");
  12     displayMenuEntry(2, "Soustraction");
  13     displayMenuEntry(3, "Multiplication");
  14     displayMenuEntry(4, "Division");
  15     displayMenuEntry(5, "Puissance");
  16     displayMenuEntry(6, "Quitter");
  17 }
  18
  19 int promptValue(const char* invite) {
  20     int value = 0;
  21     puts(invite);
  22     scanf("%d", &value);
  23     return value;
  24 }
  25
  26 int promptOperation() {
  27     displayMenu();
  28     return promptValue("Veuillez saisir un choix ?");
  29 }
  30
  31 int doAddition(int val1, int val2) {
  32     return val1 + val2;
  33 }
  34
  35 int doSubstraction(int val1, int val2) {
  36     return val1 - val2;
  37 }
  38
  39 int doMultiplication(int val1, int val2) {
  40     return val1 * val2;
  41 }
  42
  43 int doDivision(int val1, int val2) {
  44     if (val2 == 0) {
  45         printf("Division par zero !\n");
  46         // FIXME: I'm not very fond of this convention ...
  47         return 0;
  48     } else {
  49         return val1 / val2;
  50     }
  51 }
  52
  53 int doPuissance(int base, int expo) {
  54     int power;
  55     if ( expo == 1) {
  56         power = base;
  57     } else if ( expo % 2 == 0 ) {
  58         power = doPuissance(base*base, expo/2);
  59     } else {
  60         power = base*doPuissance(base*base,(expo-1)/2);
  61     }
  62     return power;
  63 }
  64
  65 int main() {
  66     int choice = promptOperation();
  67     printf("Choice: %d\n", choice);
  68
  69     return 0;
  70 }