Sams Teach Yourself C++ in 21 Days

23: if ((ch > 32 && ch < 127) || ch == ‘\n’|| ch == ‘\t’)

24: cout << ch;

25: fin.close();

26: }

5. The following is one possible solution:
   0: // Ex1705.cpp
   1: #include
   2:
   3: int main(int argc, char**argv) // returns 1 on error
   4: {
   5: for (int ctr = argc-1; ctr>0 ; ctr--)
   6: std::cout << argv[ctr] << “ “;
   7: }

Day 18

Quiz

1.Outer::Inner::MyFunc();

2. At the point the listing reaches HERE, the global version of Xwill be used, so it will
   be 4.


3. Yes, you can use names defined in a namespace by prefixing them with the name-
   space qualifier.


4. Names in a normal namespace can be used outside of the translation unit where the
   namespace is declared. Names in an unnamed namespace can only be used within
   the translation unit where the namespace is declared.


5. The usingkeyword can be used for the usingdirectives and the usingdeclara-
   tions. A usingdirective allows all names in a namespace to be used as if they are
   normal names. A usingdeclaration, on the other hand, enables the program to use
   an individual name from a namespace without qualifying it with the namespace
   qualifier.


6. Unnamed namespaces are namespaces without names. They are used to wrap a col-
   lection of declarations against possible name clashes. Names in an unnamed name-
   space cannot be used outside of the translation unit where the namespace is
   declared.


7. The standard namespace stdis defined by the C++ Standard Library. It includes
   declarations of all names in the Standard Library.

862 Appendix D

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