{"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":390,"pdf_page":406,"physical_index":406,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"8f12dc18a75b3e0f68e40ee6f157111d3517b0bb8dbc03ff27d7d8c14d9587aa"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"接着会执行end语句，程序终止并将控制权交还给操作系统。\n\n如果要将另外两个数相乘，则需要做以下工作：修改程序，改变变量的值，重新编译并重新运行程序，这将是一件非常烦琐的工作。为了避免这些重复工作，我们可以借助于另一个内部函数read。修改后的程序如下：\n\nread语句的功能是读取从键盘键入的ASCII码值，并将其转换成浮点数。\n\n循环（1oop）是高级语言的重要组成部分。循环使得程序可以对同一个变量的不同取值反复执行相同的操作。假设我们要写一段程序用来计算3，5，7，9各自的平方，可以这样编写程序：\n\nfor 语句将变量 a的值第一次设为 3，然后执行 do 关键字后面的语句。如果 do后面要执行的语句不止一条（如本例)，则必须将它们置于begin和 end之间，这两个关键字定义了一个语句块（block）。第一次循环之后，for语句会一次为a赋值5，7，9并执行\n\n编码隐匿在计算机软硬件背后的语言\n\n390","previous_page":389,"next_page":391}