URL：https://media.cheggcdn.com/media/e4d/e4df684f-3a44-462f-8d33-c5bc73d8b436/php7Vy64h
掲載元：https://www.chegg.com/homework-help/questions-and-answers/use-circuitverse-build-bcd-adder-following-logic-diagram--outputs-circuit-must-connected-h-q70963818
