原來咁計…

做緊 group project 0個陣發現要核對身份證,咁就一定要睇下佢個核對碼(check digit) 0岩唔0岩。我記得好耐以前閃電傳真機教過點計,不過就唔記得左。呢家上網搵就搵到喇,順便貼上連結

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