[c++] Why I cannot cout a string?

There are several problems with your code:

  1. WordList is not defined anywhere. You should define it before you use it.
  2. You can't just write code outside a function like this. You need to put it in a function.
  3. You need to #include <string> before you can use the string class and iostream before you use cout or endl.
  4. string, cout and endl live in the std namespace, so you can not access them without prefixing them with std:: unless you use the using directive to bring them into scope first.

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