foo.cc: In function 'std::istream& operator>>(std::istream&, ComplexArray&)':
foo.cc:84:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   84 |   for (int i = 0; i < 3; i++)
      |   ^~~
foo.cc:86:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   86 |    return in;
      |    ^~~~~~
foo.cc: In function 'std::ostream& operator<<(std::ostream&, const ComplexArray&)':
foo.cc:90:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Complex>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |   for (int i = 0; i < c.Cs.size(); i++)
      |                   ~~^~~~~~~~~~~~~

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