17. Binary to Gray Code Converter

How do you plan to solve it?

/*Write your code here*/
module bin2gray4(
    input [3:0]bin_in,
    output [3:0]gray_out
);
wire a,b,c;
assign a = bin_in[3] ^ bin_in[2];
assign b = bin_in[1] ^ bin_in[2];
assign c = bin_in[1] ^ bin_in[0];
assign gray_out={bin_in[3],a,b,c};
endmodule