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电话计费器程序/*信号定义： clk： 时钟信号，本例中其频率值为1Hz； decide： 电话局反馈回来的信号，代表话务种类，“01”表示市话，“10”表示 长话，“11”表示特话； dispmoney： 用来显示卡内余额，其单位为角，这里假定能显示的最大数额为50 元 （500 角）； disptime： 显示本次通话的时长； write,read： 当write ...

Welcome to PMOS. PMOS is a set of modules, mostly written in Modula-2, to support multitasking. PMOS was designed primarily with real-time applications in mind. It is not an operating system in the conventional sense rather, it is a collection of modules which you can import into your own programs, ...

Readers can pick up this book and become familiar with C++ in a short time. Stan has taken a very broad and complicated topic and reduced it to the essentials that budding C++ programmers need to know to write real programs. His case study is effective and provides a familiar thread throughout the b ...

关于FPGA流水线设计的论文 This work investigates the use of very deep pipelines for implementing circuits in FPGAs, where each pipeline stage is limited to a single FPGA logic element (LE). The architecture and VHDL design of a parameterized integer array multiplier is presented and also an IEEE 754 ...

Structure the sources so that the compression and decompression code form a library usable by any program, and write both gzip and zip on top of this library. This would ideally be a reentrant (thread safe) library, but this would degrade performance. In the meantime, you can look at the sample ...

1、 了解系统调用pipe()的功能和实际原理 2、 编写一段程序，使用管道实现父子进程之间的通信 a) 使用系统调用fork()创建一个子进程 b) 子进程调用函数write()向父进程发送自己的进程ID和字符串” s sending a message to parent.\n”。 c) 父进程调用函数read()通过管道读出子进程发来的消息，将消息输出屏幕，然后终止 ...

ACM试题An Easy Problem Description As we known, data stored in the computers is in binary form. The problem we discuss now is about the positive integers and its binary form. Given a positive integer I, you task is to find out an integer J, which is the minimum integer greater than I, and the numbe ...

This section contains a brief introduction to the C language. It is intended as a tutorial on the language, and aims at getting a reader new to C started as quickly as possible. It is certainly not intended as a substitute for any of the numerous textbooks on C. 2. write a recursive function FIB (n) ...

为Linux系统设计一个简单的二级文件系统。要求做到以下几点： 1．可以实现下列几条命令： login 用户登录 dir 列目录 create 创建文件 delete 删除文件 open 打开文件 close 关闭文件 read 读文件 write 写文件 2．列目录时要列出文件名，物理地址，保护码和文件长度。 3．源文件可以进行读写保护。 ...

带进度条的文件上传(java+ajax源码) 在写代码的时候，还要用到关于servlet的包servlet-api.jar。 　　写完后调试的过程中，老报错：java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream，后来一查才知道少了commons-io-1.2.jar，加上后，就ok了。 　　关于获取及显示进度部分，用了我 ...