foo.cc: In function 'void ISBN()':
foo.cc:15:4: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
    else
    ^~~~
foo.cc:17:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
     i++;
     ^

自豪的采用jd5进行评测(github.com/masnn/jd5)

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