课题一是设计一个可控的100进制可逆计数器。课题二是设计交通灯控制系统在QuartusⅡ软件环境下，进行仿真实验和硬件下载，获得的测试结果满足设计要求。课题三是设计多功能数字钟系统（层次化设计。-The subject one is to design a controllable 100- band reversible counter. Subject two is the design of the traffic light control system in the Quartus I