C++ checksum
时间: 2023-11-04 10:05:03 浏览: 42
A checksum is a value that is calculated from a block of data in order to verify the integrity of the data. It is used to detect errors that may have occurred during transmission or storage of the data. The checksum is calculated by adding up all the values in the data block and then taking the remainder of the sum divided by a fixed number. The resulting value is then appended to the data block and sent or stored along with it. When the data is received or retrieved, the checksum is recalculated and compared to the original checksum. If they match, the data is considered to be error-free. If they do not match, the data is assumed to be corrupted and must be retransmitted or retrieved. Checksums are commonly used in communications protocols, file transfer protocols, and storage systems.