zufaellig generierte Karten sind jetzt von der Zeit abhängig + weiterr Test

src/main/c/Stefan/blackjack.c

@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
+#include <time.h>
 
 int blackjack(){
 
@@ -65,7 +66,8 @@ int userInputBJ(){
 // Liefert eine Zufallszahl zwischen 1 und 10
 // Chance für 10 ist 4 Mal höher als für den Rest
 // 1 = Ass
-int getRandCard(){
+int getRandCard(int offset){
+    srand(time(NULL) + offset);
 
     int r = rand() % 13;
     r++;
@@ -91,16 +93,16 @@ int playBJ(int bet, int balance){
     int *dealerCardsArray = (int*) malloc(10 * sizeof(int));
 
     if(dealerCardsArray){
-        dealerCardsArray[0] = getRandCard();
+        dealerCardsArray[0] = getRandCard(0);
         printf("computer rand card: %d\n", dealerCardsArray[0]);
 
         int *userCardsArray = (int*) malloc(10 * sizeof(int));
 
         if(userCardsArray){
 
-            userCardsArray[0] = getRandCard();
+            userCardsArray[0] = getRandCard(1);
             printf("user rand card: %d\n", userCardsArray[0]);
-            userCardsArray[1] = getRandCard();
+            userCardsArray[1] = getRandCard(2);
             printf("user rand card: %d\n", userCardsArray[1]);
 
             if(checkForBlackjack(userCardsArray)){
@@ -125,7 +127,7 @@ int playBJ(int bet, int balance){
                 }
 
                 if(hit()){
-                    userCardsArray[i] = getRandCard();
+                    userCardsArray[i] = getRandCard(i);
                     printf("new card: %d\n", userCardsArray[i]);
                 } else{
                     break;
@@ -138,7 +140,7 @@ int playBJ(int bet, int balance){
                 dealerCardsTotal = calculateCardsTotal(dealerCardsArray, i);
 
                 if(dealerCardsTotal < 17){
-                    dealerCardsArray[i] = getRandCard();
+                    dealerCardsArray[i] = getRandCard(i);
                     printf("Computer Card: %d\n", dealerCardsArray[i]);
                     dealerCardsTotal = calculateCardsTotal(dealerCardsArray, i + 1);
                 }

src/main/c/Stefan/blackjack.h

@@ -7,7 +7,7 @@ int blackjack();
 int getBalanceBJ();
 int getBetBJ(int balance, bool *exitPtr);
 int userInputBJ();
-int getRandCard();
+int getRandCard(int offset);
 int playBJ(int bet, int balance);
 bool checkForBlackjack(int userCards[]);
 int calculateCardsTotal(int cardsArray[], int len);

src/test/c/Stefan/test_blackjack.c

@@ -116,6 +116,20 @@ void test_cards_ace_ace_9_total_equals_21() {
 
 }
 
+void test_cards_10_10_ace_total_equals_21() {
+
+    //arrange
+    int userCards[] = { 10, 10, 11};
+    int expected_result = 21;
+
+    //act
+    int actual_result = calculateCardsTotal(userCards, 3);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected_result, actual_result);
+
+}
+
 void test_blackjack_bet_equals_10() {
 
     //arrange