c string array initialization

Question

I know I can do this in C     string s       hi    there      But is there anyway to delcare an array this way without delcaring string s     e g   void foo string   strArray        some code    string s       hi    there       Works foo s      Works  foo new string    hi    there        Doesn t work

User · Answer

Prior to C  11  you cannot initialise an array using type    However the latest c  11 provides unifies  the initialisation  so you can do it in this way   string  pStr   new string 3     hi    there      See http   www2 research att com  bs C  0xFAQ html uniform-init

User · Answer

In C  11 you can  A note beforehand  Don t new the array  there s no need for that   First  string   strArray is a syntax error  that should either be string  strArray or string strArray    And I assume that it s just for the sake of the example that you don t pass any size parameter    include  lt string gt   void foo std  string  strArray  unsigned size        do stuff       template lt class T gt  using alias   T   int main      foo alias lt std  string   gt   hi    there    2       Note that it would be better if you didn t need to pass the array size as an extra parameter  and thankfully there is a way  Templates   template lt unsigned N gt  void foo int const   amp arr  N                 Note that this will only match stack arrays  like int x 5         Or temporary ones  created by the use of alias above   int main      foo alias lt int   gt  1  2  3

User · Answer

In C  11 and above  you can also initialize std  vector with an initializer list   For example   using namespace std     for example only  for  auto s   vector lt string gt   one   two   three          cout  lt  lt  s  lt  lt  endl    So  your example would become   void foo vector lt string gt  strArray        some code    vector lt string gt  s   hi    there       Works foo s      Works  foo vector lt string gt    hi    there        also works

User · Answer

With support for C  11 initializer lists it is very easy    include  lt iostream gt   include  lt vector gt   include  lt string gt  using namespace std   using Strings   vector lt string gt    void foo  Strings const amp  strings         for  string const amp  s   strings     cout  lt  lt  s  lt  lt  endl       auto main   - gt  int       foo  Strings   hi    there            Lacking that  e g  for Visual C   10 0  you can do things like this    include  lt iostream gt   include  lt vector gt   include  lt string gt  using namespace std   typedef vector lt string gt  Strings   void foo  Strings const amp  strings         for  auto it   begin  strings     it    end  strings       it                 cout  lt  lt   it  lt  lt  endl           template lt  class Elem  gt  vector lt Elem gt  amp  r  vector lt Elem gt  amp  amp  o     return o     template lt  class Elem  class Arg  gt  vector lt Elem gt  amp  operator lt  lt   vector lt Elem gt  amp  v  Arg const amp  a         v push back  a        return v     int main         foo  r  Strings      lt  lt   hi   lt  lt   there

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