{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":140,"pdf_page":156,"physical_index":156,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"8370ed3e6d38f281795a5fca13726e1ade1fc6221eb66d525af1e7f68dbcf2f3"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"这就是我们想要的结果。\n\n注意，在整个电路中仍然有两个输入和一个输出。两个输入同时作为或门和与非门的输入。或门和与非门的输出又分别作为一个与门的输入，最后得出了我们想要的结果。\n\n实际上这个电路有个专门的名称，叫做异或门，简写为XOR。之所以称为异或门是因为若想其输出结果为1，要么仅让输入A为1，要么仅让输入B为1，两输入端都为1则输出为 $\\scriptstyle \\mathbf { 0 } _ { \\circ }$ 为了不把或门、与非门和与门都画出来，我们可以使用一个电气工程师所采用的特定电气符号来表示异或门。\n\n异或门在输入端比或门多出了一条曲线，除此之外它看上去和或门非常相像。异或门的特征如下表所示。\n\n异或门是本书中详细介绍的最后一个逻辑门（第6个门有时会在电气工程中介绍到。它称做同或门，因为只有当两个输入相同的时候，其输出才为1。同或门所给出的输出刚好与异或门相反，因此同或门的符号和异或门相同，但在输出端多了个小圆圈)。\n\n让我们回顾一下到目前为止所了解的内容。将两个二进制数相加将产生一个加法位和一个进位位。\n\n编码—隐匿在计算机软硬件背后的语言\n\n140","previous_page":139,"next_page":null}