实现加密字符串技术，程序根据概率统计自动绘制一张加密表，然后对输入字符串进行加密和自动解密工作，不过为了节省时间，只能对小写字母进行加密-Technology to achieve the encrypted string, the program automatically based on probability and statistics to draw an encrypted form, and then the input string to encrypt and decrypt automatically work, but to save time, lower-case letters can only be encrypted! ! !