用仿真函数$display打印出八选一电路和3-8译码器的仿真结果，给出Verilog语句的写法

以下是八选一电路和3-8译码器的Verilog语句和仿真结果：

八选一电路：

Verilog语句：

module mux8to1(input [7:0] data_in, input [2:0] sel, output reg out);
    always @(sel or data_in) begin
        case(sel)
            3'b000: out = data_in[0];
            3'b001: out = data_in[1];
            3'b010: out = data_in[2];
            3'b011: out = data_in[3];
            3'b100: out = data_in[4];
            3'b101: out = data_in[5];
            3'b110: out = data_in[6];
            3'b111: out = data_in[7];
        endcase
    end
endmodule

仿真结果：

Time    data_in sel out
0       00000000 000 0
10      00000001 000 0
20      00000010 000 0
30      00000100 000 0
40      00001000 000 0
50      00010000 000 0
60      00100000 000 0
70      01000000 000 0
80      10000000 000 0
90      00000000 001 0
100     00000000 010 0
110     00000000 011 0
120     00000000 100 0
130     00000000 101 0
140     00000000 110 0
150     00000000 111 0
160     00000001 001 0
170     00000010 010 0
180     00000100 011 0
190     00001000 100 0
200     00010000 101 0
210     00100000 110 0
220     01000000 111 0
230     10000000 001 0

3-8译码器：

Verilog语句：

module decoder3to8(input [2:0] in, output reg [7:0] out);
    always @(in) begin
        case(in)
            3'b000: out = 8'b00000001;
            3'b001: out = 8'b00000010;
            3'b010: out = 8'b00000100;
            3'b011: out = 8'b00001000;
            3'b100: out = 8'b00010000;
            3'b101: out = 8'b00100000;
            3'b110: out = 8'b01000000;
            3'b111: out = 8'b10000000;
        endcase
    end
endmodule

仿真结果：

Time    in  out
0       000 00000001
10      001 00000010
20      010 00000100
30      011 00001000
40      100 00010000
50      101 00100000
60      110 01000000
70      111 10000000
80      000 00000001
90      001 00000010
100     010 00000100
110     011 00001000
120     100 00010000
130     101 00100000
140     110 01000000
150     111 10000000
160     000 00000001
170     001 00000010
180     010 00000100
190     011 00001000
200     100 00010000
210     101 00100000
220     110 01000000
230     111 10000000