hdlbits-Zero

Zero

Build a circuit with no inputs and one output that outputs a constant 0

Now that you've worked through the previous problem, let's see if you can do a simple problem without the hints.

HDLBits uses Verilog-2001 ANSI-style port declaration syntax because it's easier to read and reduces typos. You may use the older Verilog-1995 syntax if you wish. For example, the two module declarations below are acceptable and equivalent:

module top_module ( zero );
    output zero;
    // Verilog-1995
endmodule

module top_module ( output zero ); 

    // Verilog-2001
endmodule

Hint

Fun fact: For Quartus synthesis, not assigning a value to a signal usually results in 0. This problem is actually easier than the previous one.

solution

module top_module(
    output zero
);// Module body starts after semicolon
	assign zero = 0; //写1'b0更好
endmodule