cofetar.cpp: In function 'int main()': cofetar.cpp:20: error: 'struct std::string' has no member named 'back' cofetar.cpp:53: warning: 'auto' will change meaning in C++0x; please remove it cofetar.cpp:53: error: expected initializer before ':' token cofetar.cpp:56: error: expected primary-expression before 'return' cofetar.cpp:56: error: expected ';' before 'return' cofetar.cpp:56: error: expected primary-expression before 'return' cofetar.cpp:56: error: expected ')' before 'return'