[C++知识库]C++实现循环队列

  using std::cout;
  using std::endl;
  class Queue
  {
  public:
      Queue() {}
      ~Queue() {}
      void push(int temp)
      {
          if(full())
          {
              cout<<"queue full,push failed"<<endl;
          }
          else
          {
              que[topl]=temp;
              topl++;
              if(topl==10)topl=0;
              count++;
          }
      }
      void pop()
      {
         if(empty())
         {
             cout<<"queue is empty"<<endl;
         }
         else
         {
             que[lowl]=0;
             lowl++;
             if(lowl==10)lowl=0;
             count--;
         }
      }
      int front()
      {
          if(empty())
          {
              cout<<"que is empty"<<endl;
          }
          else return que[lowl];
?     }
      int back()
      {
          if(empty())
          {
              cout<<"que is empty"<<endl;
          }
          else if (topl==0)
          {
              return que[9];
          }
          else return que[topl-1];
?     }
      bool empty()
      {
          if(count==0)return true;
          else return false;
      }
      bool full()
      {
          if(count==10)return true;
          else return false;
      }
  private:
      int topl=0;
      int lowl=0;
      int count=0;
      int que[10];
  };

对列为大小为10的int数组