音乐小程序

手把手叫你学单片机，这是里面的源代码，很适合初学者快速上手51单片机的资料-You to learn hands-called single-chip, which is inside the source code, it is suitable for beginners quick start 51 SCM information

keil c51

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微机原理8254与8255设计的手动跟自动的路灯控制系统-8254 8255

用asm编的模拟dos中doskey命令的程序。按上下提取之前在终端输入的命令。-use asm series of the simulation were doskey dos order procedures. By extracting next before the end of the importation order.

基于STC5410单片机AD功能模块测试-Based on test STC5410AD

串口的用法，proteus仿真，程序，原理图全套。-Serial port usage, proteus simulation, procedures, a full set of schematics.

DS1620/8051显示器

汇编语言实现的控制小键盘的小程序，输入字母数字时能在小键盘上显示出来-Assembly language to achieve the control of a small keyboard applet, enter the alphanumeric keyboard can be displayed in a small out

学生成绩核算系统的设计与实现（25） 要求：（1）按班级按课程从文件中读入相应的平时成绩、期中考试成绩和期末考试成绩。 （2）三个成绩对总评成绩的百分比被定义为常数，各占总成绩的30 、30 和40 。 （3）计算每位学生的总评成绩。 （4）计算该班级本课程的总平均成绩。 （5）计算处于优、良、中、及格、不及格的学生人数以及占总人数的百分比。其中100-90为优，89-80为良，79-70为中，69-60为及格，60分以下为不及格。 （6）按要求输出成绩在优、良、中、及格、不及格各区间的学生学号、成绩。-The student achievement calculation system s design with realizes (25) Request: (1) reads in the corresponding usual result, the midterm examination result and the terminal examinations result according to the class and grade according to the curriculum from the document. (2) three result are defined to the general appraisal result s percentage as the constant, occupies the overall result respectively 30 , 30 and 40 . (3) calculates each student s general appraisal result. (4) calculates this class and grade this curriculum the population mean result. (5) calculates the student population which is in superiorly, good, passes an examination, does not pass an examination as well as accounts for the total number of peop