VHDL语言设计的加法器，在试验箱上使用8个拨码开关设置要加的2个数，按键按下输出相加的结果，在试验箱上测试通过。-Adder VHDL language design, in the chamber using the DIP switch setting 8 to 2 to add the number of keys pressed result of the addition output of the chamber on the test.