desen.cpp: In function 'int main()': desen.cpp:74: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x desen.cpp:74: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x desen.cpp:82: warning: comparison between signed and unsigned integer expressions desen.cpp:63: warning: unused variable 'a' desen.cpp:63: warning: unused variable 'b'