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                # a+=b與a=a+b的關系 ## 代碼案例: ## 以下代碼中,byte類型與int類型 如果是a+=b 那么底層自動轉換格式不用強制轉換 ## ## a=a+b 需要強制轉換類型,不然會報錯 ``` 下面的代碼哪一句出錯: 4 byte a = 10; --->1 int b = 20; --->2 a+=b; ---->3 a = a+b ;---->4 更正: a = (byte)(a+b); ```
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