Introduction - If you have any usage issues, please Google them yourself
, Respectively, using the information communication mechanism UNIX, shared memory mechanism (with traffic lights between the implementation of the process of synchronization and mutual exclusion) between the two processes to achieve data communications. Specific communication data can be read from a file, the recipient can process the data received to write a new document in order to determine the accuracy of data (for file-speaking students are not familiar with reading and writing files may not have to go through, as long as keyboard input and output can be compared to the screen).