Compilare: user.cpp: In member function ‘nmare nmare::operator-=(nmare)’: user.cpp:96:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:138:28: warning: operation on ‘cont’ may be undefined [-Wsequence-point] x[++cont]=x[cont-2]; ^ user.cpp:129:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘char desc(nmare, int)’: user.cpp:125:1: warning: control reaches end of non-void function [-Wreturn-type] } ^