简易的VHDL程序，主要实现ALU的逻辑功能，进行选择和数据的移动。很适合初学者对VHDL的理解。内含有testbench可以进行Qutarus的仿真-Simple VHDL program, the main achievement of the ALU logic functions, to select and move data. VHDL is suitable for beginners to understand. Containing a simulation testbench