Verilog Module quanjiaqi: Implementing XOR and OR Logic

The Verilog module 'quanjiaqi' takes three input wires 'A', 'B', and 'C', and produces four output wires 'S', 'S1', 'S2', and 'S3', as well as an output wire 'Ci'.

The output wire 'S' is calculated as the XOR of 'A', 'B', and 'C'. This is done by first calculating 'S1' as the XOR of 'A' and 'B', and then calculating 'S' as the XOR of 'S1' and 'C'.

The output wire 'Ci' is calculated as the OR of two terms. The first term is the AND of 'A' and 'B', and the second term is the AND of 'S1' and 'C'.

The module utilizes XOR gates to calculate 'S1' and 'S', and AND and OR gates to calculate 'Ci'.