Error in "Go Language Programming", "2.7 Complete Example"

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Today read "Go language programming" again found two errors, one is the directory name algorithms, according to the context, the directory name should be not the last subtitle s algorithm, because the last main main program import package , call sort function, and compile link, all adopt the name of algorithm, the structure of the book is as follows:

The compilation of the program directory structure as shown in the book also causes errors:

can ' t load package cannot find package

After re-organizing, modify the following directory structure to no longer report the failure to load the package and cannot find the package error:

Is the result of compiling and running the program after modifying it into the correct structure:

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