Compilare: main.cpp: In member function 'Matrice& Matrice::operator*=(Matrice&)': main.cpp:152:17: warning: reference to local variable 'tmp' returned [-Wreturn-local-addr] Matrice tmp(n,mat.getM()); ^~~ main.cpp: In function 'std::ostream& operator<<(std::ostream&, const Matrice&)': main.cpp:302:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In static member function 'static double Matrice::Tr(Matrice)': main.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator+=(Matrice&)': main.cpp:115:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator-=(Matrice&)': main.cpp:126:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator+(Matrice&)': main.cpp:137:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator-(Matrice&)': main.cpp:148:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator*=(Matrice&)': main.cpp:162:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator*(Matrice&)': main.cpp:179:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'Matrice& Matrice::operator=(Matrice)': main.cpp:234:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In static member function 'static double Matrice::determinant(Matrice)': main.cpp:257:1: warning: control reaches end of non-void function [-Wreturn-type] } ^