Question

quartus ii 11.0在语言vhdl下编译出现错误,求大神帮忙

Error (10482): VHDL error at h_adder.vhd(11): object "cn1" is used but not declared
Error: Quartus II Analysis & Synthesis was unsuccessful. 1 error, 0 warnings
Error: Quartus II Full Compilation was unsuccessful. 3 errors, 0 warnings
Error (10327): VHDL error at h_adder.vhd(11): can't determine definition of operator ""+"" -- found 0 possible definitions

Answer 1

E文不看么。。。 就是说你用了cn1 但是没有声明啊
、最后一个 你把常用 的arith.all,1164.all,unsigned .all几个 库都添加了