Add exo2 preliminary structure

[TD_C.git] / exo2 / exo2.c

#include <stdio.h>
//#include <stdbool.h>

//FIXME: Comment the code !!!

void displayMenuEntry(int num, const char* option) {
    printf("%d - %s\n", num, option);
}

void displayMenu() {
    displayMenuEntry(1, "Addition");
    displayMenuEntry(2, "Soustraction");
    displayMenuEntry(3, "Multiplication");
    displayMenuEntry(4, "Division");
    displayMenuEntry(5, "Puissance");
    displayMenuEntry(6, "Quitter");
}

int promptValue(const char* invite) {
    int value = 0;
    puts(invite);    
    scanf("%d", &value);
    return value;
}

int promptOperation() {
    displayMenu();
    return promptValue("Veuillez saisir un choix ?");
}

int doAddition(int val1, int val2) {
    return val1 + val2;
}

int doSubstraction(int val1, int val2) {
    return val1 - val2; 
}

int doMultiplication(int val1, int val2) {
    return val1 * val2;
}

int doDivision(int val1, int val2) {
    if (val2 == 0) {
        printf("Division par zero !\n");
        // FIXME: I'm not very fond of this convention ...
        return 0;
    } else {
        return val1 / val2;
    }
}

int doPuissance(int base, int expo) {
    int power;
    if ( expo == 1) {
        power = base;               
    } else if ( expo % 2 == 0 ) {
        power = doPuissance(base*base, expo/2);    
    } else {
        power = base*doPuissance(base*base,(expo-1)/2);
    }
    return power;
}

int main() {
    int choice = promptOperation();
    printf("Choice: %d\n", choice);

    return 0;
}