[HDLBits] Adder100i

Create a 100-bit binary ripple-carry adder by instantiating 100 full adders. The adder adds two 100-bit numbers and a carry-in to produce a 100-bit sum and carry out. To encourage you to actually instantiate full adders, also output the carry-out from each full adder in the ripple-carry adder. cout[99] is the final carry-out from the last full adder, and is the carry-out you usually see.

module top_module( 
    input [99:0] a, b,
    input cin,
    output [99:0] cout,
    output [99:0] sum );
    always@(*) begin
        {cout[0],sum[0]}=a[0]+b[0]+cin;
        for(int i=1;i<100;i=i+1)
        {cout[i],sum[i]}=a[i]+b[i]+cout[i-1];
    end
endmodule

很巧妙啊。因为py和c很少有等号左边有合并操作的情况，所以这方面需要熟悉。貌似也不用generate语句