X-Git-Url: https://git.piment-noir.org/?p=TD_C.git;a=blobdiff_plain;f=TP_4%2Ftp4.c;fp=TP_4%2Ftp4.c;h=37166eb4dec38fe1557cae8a73c164cceb430c0c;hp=0000000000000000000000000000000000000000;hb=af2ef71d210adde3545c1c045cb69d694d16cc79;hpb=995c32c8f000524aaefad52bcea923ca39c3d64b

diff --git a/TP_4/tp4.c b/TP_4/tp4.c
new file mode 100644
index 0000000..37166eb
--- /dev/null
+++ b/TP_4/tp4.c
@@ -0,0 +1,136 @@
+#include <stdio.h>
+
+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 prompt(const char* msg) {
+    puts(msg);
+    int value;
+    scanf("%d", &value);
+    return value;
+}
+
+int promptUserChoice() {
+    int choice;
+    displayMenu();
+    return choice = prompt("Veuillez saisir un choix d'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) {
+    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 = 1;
+    for (int iter = 0; iter < expo; iter++) {
+	power *= base ; 
+    }
+    return power;
+}
+
+int doPuissanceSmart(int base, int expo) {
+    int power;
+    if (expo == 1) {
+        power = base;        	    
+    } else if (expo % 2 == 0) {
+	power = doPuissanceSmart(base*base, expo/2);    
+    } else {
+        power = base*doPuissanceSmart(base*base,(expo-1)/2);
+    }
+    return power;
+}
+
+int doPuissanceSmartIter(int base, int expo) {
+    int power = 1;
+    while (expo > 1) {
+        if (expo % 2 == 0) {
+            expo /= 2;
+        } else {
+	    power *= base;
+	    expo = (expo - 1) / 2;
+        }
+    	base *= base;
+    }
+    return power * base;
+}
+
+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 = doPuissanceSmartIter(val1, val2);
+            break;
+        case 6:
+            break;
+        default:
+            puts("Faire un choix entre 1 et 6");
+    }
+    return op_result;
+}
+
+/* int promptValue(const char* invite) {
+    int input;
+    return input = prompt(invite);
+} */
+
+void promptValue(const char* invite, int* value) {
+    puts(invite);    
+    scanf("%d", value);
+}
+
+void promptBothValues(int* val1, int* val2) {
+    promptValue("Veuillez saisir la premiere valeur", val1);
+    promptValue("Veuillez saisir la deuxieme valeur", val2);
+}
+
+int main() {
+    int choiceresult, value1, value2, result;
+    for (;;) {
+        choiceresult = promptUserChoice();
+        if (choiceresult == 6) break;	    
+	promptBothValues(&value1, &value2);
+        result = doOperation(choiceresult, value1, value2);
+	printf("Le resultat est %d\n", result);
+	printf("\n");
+    }
+}