I am new in the programming in VHDL, and am doing a adder subtracter but me mistakes appear with the AND.
1 Library ieee;
2 Use ieee.std_logic_1164.all;
3 Entity Sumador_Restador is
4 port(A0,A1,A2,A3,B0,B1,B2,B3,E: In std_logic;
5 S0,S1,S2,S3,T0,T1,T2,T3,T4: Out std_logic);
6 End...