pointer

DeitelC/Chapter7/test3.c

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+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+
+void useAliceSuperPower(int *num);
+void useBobSuperPower(int *num);
+
+int main(void)
+{
+    int bob = 0;
+    int alice = 0;
+    srand(time(NULL));
+
+    for(int i = 0; i < 1000; ++i){
+        int die = 1 + rand() % 6;
+        
+        useAliceSuperPower(&die);
+        useBobSuperPower(&die);
+
+        // Keep within 1-6 range
+        if(die < 1) die = 1;
+        if(die > 6) die = 6;
+
+        if(die % 2) {
+            ++bob;
+        } else {
+            ++alice;
+        }
+    }
+
+    printf("Alice: %d, Bob: %d\n", alice, bob);
+    return 0;
+}
+
+void useAliceSuperPower(int *num) {
+    // Only subtract 1 if it's odd and greater than 1
+    if(*num % 2 && *num > 1) {
+        (*num)--;
+    }
+}
+
+void useBobSuperPower(int *num) {
+    // HALF the power: Only add 1 (not double)
+    if(*num < 6) {
+        (*num)++;
+    }
+}