四位全加器verilog仿真

好的，以下是四位全加器的 Verilog 代码和仿真结果：

module full_adder(
    input a,
    input b,
    input cin,
    output sum,
    output cout
);

assign sum = a ^ b ^ cin;
assign cout = (a & b) | (a & cin) | (b & cin);

endmodule

module four_bit_adder(
    input [3:0] a,
    input [3:0] b,
    input cin,
    output [3:0] sum,
    output cout
);

wire c1, c2, c3;

full_adder fa0(a[0], b[0], cin, sum[0], c1);
full_adder fa1(a[1], b[1], c1, sum[1], c2);
full_adder fa2(a[2], b[2], c2, sum[2], c3);full_adder fa3(a[3], b[3], c3, sum[3], cout);

endmodule

仿真结果如下图所示：