message: Rename `r` to `rate`
diff: @@ -33,7 +33,7 @@ public:
  int update(int morale, int food, int residences, int universities, int nurseries, int hospitals);
  - void starveRate(float r) { mStarveRate = r; }
  + void starveRate(float rate) { mStarveRate = rate; }
  protected:
  