Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:69: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x user.cpp:70: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x user.cpp:75: error: ‘n’ was not declared in this scope user.cpp:80: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x user.cpp:87: warning: comparison between signed and unsigned integer expressions