this is a railway reservation system

这是我做的数据采集实验，通过AD采集数据，DA口输出模拟电压值-This is what I do experimental data acquisition, through the AD data acquisition, DA analog output voltage value

数根 数也有根吗？有！数根就是把一个数的各个数位上的值相加，直到得到一个一位数为止。请你编写一个程序来计算任意数N（0≤N≤1000000000000）的根。 输入： 输入有多个案例。每一个案例为一行，每行只有一个整数N。当输入的N是-1时，输入结束。 输出： 每一个案例输出一行。每行只有一个数字，就是N对应的数根。 Sample input 39 -1 Sample output 3-Number of root number also has roots do? There is! The number of roots is to a number of different values on the digital sum until they have been a number of up to one. Please write a program to calculate an arbitrary number N (0 ≤ N ≤ 1000000000000) roots. Input: Enter a number of cases. Each case for the line, each line is only an integer N. When the input of N is-1, the input end. Output: the output line of each case. There is only one number per line, that is, N corresponds to the number of roots. Sample input 39-1 Sample output 3

matlab codes for ofdm and radars

运放设计的一些注意点，如何实际一个稳定的运放的一些小技巧-OPAMP design point some attention to how real a stable OPAMP some tips

算24啊。输入四个1到13得数字，通过四则运算得到24。可以通过他自动得出所有方法。-count 24. Input 4 1-13 figure through four operations to be 24. Can he come all the way automatically.

可以看看啊！对学习操作系统又急于做课程设计的同学有帮助！！1-Can look at ah! Also eager to learn the operating system to do the curriculum design has helped the students! ! 1

用idl进行二项式拟合得例子,通过不同参数,可以拟合不同得二项式,还有ps与eps制图,适合初学者-Idl carried out by fitting a binomial example, through the different parameters can be different from a binomial fitted, as well as ps and eps graphics, suitable for beginners

这是模拟物理实验――一维势阱的小程序。运行的时候，需要把CCBP文件夹包含在头文件中。-This is the simulation of physics experiment-- one-dimensional potential well of small programs. When run with the need to be CCBP folder contains the first document.

一个用C语言编写的清除CMOS密码的小程序-a C language prepared by the removal of a small password CMOS process

DSP开发练习的极好的范例程序（经典例子程序）-practice and the development of DSP an excellent example (classical examples of procedures)