Introduction - If you have any usage issues, please Google them yourself
The experiment is based on the teacher to complete the courseware, the whole train of thought experiment is this: read and write files in the first design three models, each model in the first read-write to read data from the source file, and then some in the data operations, such as: shift, etc., then re-write the destination file. As the time taken by each reader has a certain randomness, in order to more accurately compare the various modes of reading and writing time for each program are read and write mode operation carried out 10 times and then get the average of each mode reading and writing time, followed by the comparison.