urgenta.cpp: In function 'int main()': urgenta.cpp:38: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x urgenta.cpp:38: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x urgenta.cpp:38: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x urgenta.cpp:48: warning: comparison between signed and unsigned integer expressions urgenta.cpp:64: warning: comparison between signed and unsigned integer expressions