68. 4-bit Comparator

/*Write your code here*/
module maxmin4(
    input  [3:0] a, 
    input  [3:0] b, 
    input  [3:0] c, 
    input  [3:0] d,
    output [3:0] max, 
    output [3:0] min
);
    wire [3:0] max_ab, min_ab;
    wire [3:0] max_cd, min_cd;

    assign max_ab = (a > b) ? a : b;
    assign max_cd = (c > d) ? c : d;

    assign min_ab = (a < b) ? a : b;
    assign min_cd = (c < d) ? c : d;

    assign max = (max_ab > max_cd) ? max_ab : max_cd;
    assign min = (min_ab < min_cd) ? min_ab : min_cd;
endmodule