Compilare: user.cpp:65:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:17: warning: comparison between signed and unsigned integer expressions user.cpp:43: warning: format '%u' expects type 'unsigned int', but argument 3 has type 'long unsigned int' user.cpp: In function 'long int det(int&)': user.cpp:59: warning: comparison between signed and unsigned integer expressions