Rename one TP number.

[TD_C.git] / TP_7 / exo2 / exo2.c

diff --git a/TP_7/exo2/exo2.c b/TP_7/exo2/exo2.c
new file mode 100644 (file)
index 0000000..7a97f69
--- /dev/null
+++ b/TP_7/exo2/exo2.c
@@ -0,0 +1,114 @@
+#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 choisir une operation ?");
+}
+
+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) {
+    //FIXME: Useless code path given the exit main loop condition
+    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 doOperation(int selection, int val1, int val2) {
+    int op_result;
+    switch (selection) {
+        case 1:
+            op_result = doAddition(val1, val2);
+            break;
+        case 2:
+            op_result = doSubstraction(val1, val2);
+            break;
+        case 3:
+            op_result = doMultiplication(val1, val2);
+            break;
+        case 4:
+            op_result = doDivision(val1, val2);
+            break;
+        case 5:
+            op_result = doPuissance(val1, val2);
+            break;
+        case 6:
+            break;
+        default:
+            puts("Faire un choix compris entre 1 et 6");
+    }       
+    return op_result;
+}
+
+int main() {
+    int choice = promptOperation();
+    int value1 = promptValue("Veuillez saisir une valeur entiere initiale ?");
+    int value2 = 0, result = 0; 
+    bool first_loop = true;
+    
+    for (;;) {
+        if (choice == 6) break;
+        if (first_loop) {
+            value2 = promptValue("Veuillez saisir une valeur entiere avec laquelle l'operation sera effectuee ?");
+            if (value2 == 0) break;
+            result = doOperation(choice, value1, value2);
+            first_loop = false;
+        } else {
+            value2 = promptValue("Veuillez saisir la prochaine valeur entiere avec laquelle l'operation sera effectuee sur l'ancien resultat ?");
+            if (value2 == 0) break;
+            result = doOperation(choice, result, value2); 
+        }
+        printf("Le resultat de l'operation choisie est %d\n\n", result);
+    }
+
+    return 0;
+}