s20_stream\introduce.txt
..........\part1\rtl\assembling_adder.v
..........\....2\rtl\change.v
..........\....4\add.v
..........\.....\mux.v
..........\.....\send.v
..........\.....\top.v
..........\....1\rtl
..........\....2\rtl
..........\part1
..........\part2
..........\part4
s20_stream