`timescale 1ns/1ns module top_module( input [4:0] a, b, c, d, e, f, output [7:0] w, x, y, z ); wire [1:0] g=2'd3; wire [31:0] h; assign h={a,b,c,d,e,f,g}; assign {w,x,y,z}=h; endmodule b是二进制,d表示十进制