这是我的代码需要做什么的图片。通话前:+----+|-9|+----+/\/\+----++----+|3||15|+----++----+//\//\+----++----++----+|0||12||24|+----++----++----+/\/\+----++----+|6||-3|+----++----+通话后:+----+|-9|+----+/\/\+----++----+|6||30|+----++----+//\//\+----++----++----+|0||24||48|+----++----++----+/\/\+----++----+|12||-3|+----+