本程序实现对字符和数字的凯撒密码和维吉尼亚密码的加密，可以识别特殊字符和大小写字母的识别与转换-This program realization of characters and Numbers Caesar password and Virginia password encryption, can identify the special characters and case letters recognition and conversion

本程序是窗函数的测试，包含了常用的窗函数，说明了凯撒窗的使用，适合用于初学MATLAB的人学习窗函数的使用，可以直接移植到其他程序-This procedure is a window function test, including the commonly used window function, the use of kaiser windows, suitable for beginners MATLAB learning window function use, can be dir