What is missing in line 13? timescale 1 ns / 1 ps 2 default_nettype none /* This

Question

What is missing in line 13? timescale 1 ns / 1 ps 2 default_nettype none /* This module describes the gate-level model of * 4 *a full-adder in Verilog */ 6 module full_adder(S, Cout, A, B, Cin); 8 /* declare output and input ports*/ //1-bit wires 10 input wire A, B, Cin: //] - bit wires 12 /*declare internal nets */ wire and BC in. and AC in: //1-bit wires (missing something???! 14 /* use dataflow to describe the gate-level activity */ 16 assign S A ^ B ^ Cin; // the hat (^) is for XOR assign and AB = A & B: // the ampersand (&) is for and 18 // fill in code for and BC, and AC assign Cout = and AB | and BC in: //pipe (|) is for or 20 //oh btw, the above line is missing something ... 22 endmodule

Explanation / Answer

Expression for Cout in 1-but full adder is Cout = (A and Cin) + (B and Cin) + (A and B)

Thus one more wire is need to be declared to provide and opration between A and B inputs.

13th line will be:-              wire andBCin, andACin, andAB

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