ecc校验c代码实现类库，帮助学习ecc校验原理，可直接调用相关函数实现对文件的ecc校验。-ecc parity c code to achieve the class libraries, and help learning ecc parity principle, the correlation function can be called directly ecc checksum file.

md5加解密实现c代码，帮助学习md5加解密实现原理，直接调用相关函数实现对文件的解密与加密。-md5 encryption and decryption of C code, and help learning the md5 encryption and decryption to achieve the principle of the direct correlation function is called the decryption and encryption of the fi

皮尔逊相似度计算方法，C语言实现 两组n*1维向量比较相似度-Pearson Correlation Coefficient