immortal.cpp: In function 'void back(int)': immortal.cpp:55: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x immortal.cpp:55: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x immortal.cpp: In function 'int main()': immortal.cpp:72: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result immortal.cpp:80: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result