Compilare: user.cpp: In function ‘int main()’: user.cpp:26:14: warning: unused variable ‘j’ [-Wunused-variable] int nr,i,j,k; ^ user.cpp:26:16: warning: unused variable ‘k’ [-Wunused-variable] int nr,i,j,k; ^ user.cpp: In function ‘int cifre(int)’: user.cpp:17:12: warning: ‘suma’ may be used uninitialized in this function [-Wmaybe-uninitialized] return suma; ^~~~ user.cpp: In function ‘int main()’: user.cpp:40:23: warning: ‘suma’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << cifre(k) << endl; ^