Variable Parameter template added to the C ++ 11 standard)

C ++ 11Variable Parameter template added to the standard"(Variadic template).

In a variable parameter templateTypenameThe number is variable length. The following is an example.G ++ 4.6.1And runs successfully.

 /*  * C ++ 11 standard variable parameter template sample *** copyright ye Jianfei 2012 *** compilation command: * g ++ myprintf. CPP-O myprintf-STD = C ++ 0x-wall *  */  # Include <Iostream> # Include <Cstdlib> # Include <Stdexcept>Void Myprintf ( Const   Char * S ){  While (* S ){  If (* S = '  %  '  ){  If (* (S + 1 ) = '  % '  ){ ++ S ;}  Else  {  Throw STD: runtime_error ( "  Invalid format string: Missing arguments  "  ) ;}} STD: cout <* S ++ ;}}  Template < Typename T,Typename ... ARGs> Void Myprintf ( Const   Char * S, T value, argS... ARGs ){  While (* S ){  If (* S = '  %  '  ){  If (* (S + 1 ) ='  %  '  ){ ++ S ;}  Else  {STD: cout < Value; myprintf (S + 1 , ArgS ...); //  It is called even when * s = 0 to detect unnecessary parameters.                  Return  ;} STD: cout <* S ++;}  Throw STD: logic_error ( "  Extra arguments provided to myprintf  "  );}  Int  Main (){  //  Output a parameter for each percent sign Myprintf ( "  A % bcde % fghij % KL % Mn \ n  " , 12 , " Interesting  " , 8421 , "  Very_interesing  "  );  Return  Exit_success ;}