foo.c: In function 'main':
foo.c:11:2: error: 'cout' undeclared (first use in this function)
   11 |  cout << 4659 << endl;
      |  ^~~~
foo.c:11:2: note: each undeclared identifier is reported only once for each function it appears in
foo.c:11:18: error: 'endl' undeclared (first use in this function)
   11 |  cout << 4659 << endl;
      |                  ^~~~

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