foo.cc: In function 'int main()':
foo.cc:12:9: error: 'cost' was not declared in this scope; did you mean 'const'?
   12 |         cost = 10.0 + (d - 3.0) * 2.5;
      |         ^~~~
      |         const
foo.cc:14:9: error: 'cost' was not declared in this scope; did you mean 'const'?
   14 |         cost = 10.0 + 7.0 * 2.5 + (d - 10.0) * 3.75;
      |         ^~~~
      |         const
foo.cc:18:13: error: 'setprecision' was not declared in this scope
   18 |     cout << setprecision(2);
      |             ^~~~~~~~~~~~
foo.cc:19:13: error: 'cost' was not declared in this scope; did you mean 'const'?
   19 |     cout << cost << endl;
      |             ^~~~
      |             const

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