默认位宽

 

module test ();
    initial begin
        $display("ans is %b", 5'd17);
        $display("ans is %b", 7'hfa);
        $display("ans is %b", 12);
        $display("ans is %b", 'h56);
        $display("ans is %b", 5'b1);
    end
endmodule

结果：

默认位宽32，过短则被截取，这里的位宽指的是二进制的位宽长度，与bodh无关。

ans is 10001
ans is 1111010
ans is 00000000000000000000000000001100
ans is 00000000000000000000000001010110
ans is 00001