Compilare: user.cpp: In function 'long long int num(long long int)': user.cpp:12: warning: unused variable 'n2' user.cpp: In function 'int main()': user.cpp:76: warning: format '%d' expects type 'int*', but argument 2 has type 'long long int*' user.cpp:76: warning: format '%d' expects type 'int*', but argument 3 has type 'long long int*' user.cpp:135: warning: format '%d' expects type 'int', but argument 2 has type 'long long int' user.cpp: In function 'long long int num(long long int)': user.cpp:12: warning: 'nr' may be used uninitialized in this function