char m[] ={"1. 增加城市信息","2. 删除城市信息","3. 修改城市信息","4. 保存城市信息至文件","5. 从文件读取城市信息","6. 对城市排序","7. 显示所有城市信息","8. 设置飞机信息","9. 显示飞机信息","10. 判断起飞飞机是否可以刹车","11. 查询飞机雷达半径内所有城市信息","0. 退出"};初始值设定相值太多怎么解决