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[g arumugam <arumugamgandhi@xxxxxxxxx>]

I am using gcc 4.9.3. i saw this compiler is using C++11. when i use
one of C++11 feature it throws that is available only in C++11. so i
remodified the command to use std=c++11 but then it throws me list of
standard errors.as mentioned below

                                             ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'std::string std::to_string(long long unsigned int)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2927:45:
error: 'vsnprintf' is not a member of 'std'
   { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
                                             ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'std::string std::to_string(float)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2936:45:
error: 'vsnprintf' is not a member of 'std'
     return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
                                             ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'std::string std::to_string(double)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2945:45:
error: 'vsnprintf' is not a member of 'std'
     return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
                                             ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'std::string std::to_string(long double)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2954:45:
error: 'vsnprintf' is not a member of 'std'
     return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
                                             ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'long long int std::stoll(const wstring&, std::size_t*,
int)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2976:31:
error: 'wcstoll' is not a member of 'std'
   { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
                               ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'long long unsigned int std::stoull(const wstring&,
std::size_t*, int)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2981:31:
error: 'wcstoull' is not a member of 'std'
   { return __gnu_cxx::__stoa(&std::wcstoull, "stoull", __str.c_str(),
                               ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'float std::stof(const wstring&, std::size_t*)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2987:31:
error: 'wcstof' is not a member of 'std'
   { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
                               ^
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h: In
function 'long double std::stold(const wstring&, std::size_t*)':
c:\mingw\lib\gcc\mingw32\4.9.3\include\c++\bits\basic_string.h:2995:31:
error: 'wcstold' is not a member of 'std'
   { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }