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Description: Learning by doing applications
Introduction- Dedicated to want to use a and engineers understand
Once in a product testing project, customer requirements: When nonconforming product is detected, write down the serial number of the product corresponds to the test when
Between the tests and indicators of these data Zhong Jian able to manage and query. Because there is no systematic study had their own , so the first time to think of a solution is the way of the file (the data can only be saved as files). When using file 迚 line data storage and management, encountered a huge problem: how to query data? Basic file IO functions, Jian did not provide ready-query functions, it must be their own programming. Realization of the process is the first data is read into memory, and then look for the line based on keywords 迚 linear,
The time complexity of linear search is O (N), so that when the amount of data increases, it will be a very scary process. The insurmountable obstacle again force
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