一、责任链模式

现有 “战士”、“班长”、“排长”、“连长”，“营长”五种角色，当有人要请假时要进行以下处理

1.只能是下级象上级请假（如“排长”只能向“连长请假”）

2.班长可以批准1天内的假期，排长批5天，连长批10天，营长批20天，20以上不准假

请用责任链模式处理以下情况，输出具体的批准过程：

1.战士请12天假

2.排长请3天假

-First, the existing chain of responsibility pattern of " fighters" , " squad leader" , " platoon" , " company commander" , " battalion commander"　five roles, when it was time to leave to carry out the following 1. Can only be lower, as higher levels leave (such as " platoon leader,"　only to " leave the company commander" ) 2. The squad leader can be approved within 1 day of the holiday, five days a platoon leader of the grant, the company commander approved 10 days, battalion commander approved 20 days, more than 20 are not allowed to leave, please chain model to deal with the responsibility of the following circumstances, the output of specific approval process: 1. soldiers requested 12 days leave 2. 3 days, please leave a platoon leader