Added a score grading system (v_AllAboutSpace)

src/main/quizproject.c

@@ -3001,7 +3001,14 @@ void v_allaboutspace(void){
       printf("\nIncorrect\n");
     }
     
-    printf("\nYour score is: %d\n", space_score);
+    printf("\nYour score is: %d\n\n", space_score);
+    if (space_score == 5) {
+      printf("\nCongratulations! You are ready to take off!\n\n");
+    } else if (space_score >= 3) {
+      printf("\nGood job! But you need some more training before you venture into space.\n\n");
+    } else {
+      printf("\nYou tried... but time to study more about Space!\n\n");
+    }
 }