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 II software environment, the simulation experiment and the hardware download, get the test results meet the design requirements. Topic three is the design of multi function digital clock system (hierarchical design.