Lesson 6

06/Optional04.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+int hats[6] = {0};
+int count = 0;
+
+void nextChild(int childIndex, int whiteRemaining, int blackremaining) {
+    int i;
+    if (childIndex == 6) {
+        count++;
+        for (int i = 0; i < 6; i++) {
+            if (hats[i] == -1) {
+                printf("White");
+            }
+            else {
+                printf("Black");
+            }
+            printf("\t");
+        }
+        printf("\n");
+    }
+    if (whiteRemaining > 0) {
+        hats[childIndex] = -1;
+        nextChild(childIndex + 1, whiteRemaining - 1, blackremaining);
+    }
+    if (blackremaining > 0) {
+        hats[childIndex] = 1;
+        nextChild(childIndex + 1, whiteRemaining, blackremaining - 1);
+    }
+}
+
+int main() {
+    nextChild(0, 3, 3);
+    printf("Total: %d", count);
+    return 0;
+}