bandpass-filter

计数一个字符串中所有字符出现的频数，并全部输出(Count the number of frequency of all the characters in a string appears, and all output)

说明：  可求任意长整数的加减法，输入格式为1，1111，1111类型的格式(Rectifiable arbitrary long integer addition and subtraction, enter the format type of format 1,1111,1111)

c和c++动态数组的实现.visual studio 2008下编译通过(c and c++ realize dynamic array. visual studio 2008 under the compiler through)

VC编写的隐藏桌面窗口程序的工具，可以方便快速的一键隐藏和显示指定的程序！(VC hiding desktop windows program written in the tools that can facilitate the quick hide and show a button with the specified procedure!)

VB编程实现改变系统日期格式,有需要的就下载吧。(VB Programming to change the system date format, there is a need to download it.)

VB使用SHEmptyRecycleBin方法， 依赖于shell32.dll动态链接库清空回收站，点击窗口中的按钮即可一键清空回收站。本源码主要是熟悉SHEmptyRecycleBin函数的使用，这个函数不只有清空回收站的功能，还可以统计查询回收站中的文件数量，占用字节大小等。 (VB using the SHEmptyRecycleBin method, relies on the dynamic link library shell32.dll empty the recycle bin, click on the window button quick clear recycling station. The main source is the use of familiar with the SHEmptyRecycleBin function, this function is not only the empty recycle bin function, can also query statistics the number of files in the recycle bin, occupy the byte size etc.. )

对一段只含有几种字符的字符串进行转换，转换成相应的数字(a string contains only several character conversion, and converted into the corresponding digital )

Accumulator code is source code for simulating accumulator.

C语言实现带通滤波器，可以直接运行。在信号处理过程中非常有用(C language implementation bandpass filter, which can be run directly.In the process of signal processing is very useful)

完成键盘的各种等功能 完成键盘的各种等功能(Completed a variety of features such as a keyboard to complete a variety of features such as keyboard)