用于计算多边形的面积,体积,长度, 用于操作系统的开发 用于数据的加密-used in the calculation of the polygon area, volume, length, for the development of the operating system for data encryption

MD5加密算法，可以加密包含二进制数据的数据块，生成16字节MD5加密数据。-MD5 encryption algorithm to encrypt data blocks that contain binary data, generates a 16-byte MD5 encrypted data.