Compilare: user.cpp: In function ‘int main()’: user.cpp:8:17: warning: unused variable ‘j’ [-Wunused-variable] int n,b,c,i,j,x=0,nc=0,vf=0; ^ user.cpp:8:19: warning: unused variable ‘x’ [-Wunused-variable] int n,b,c,i,j,x=0,nc=0,vf=0; ^ user.cpp:8:23: warning: unused variable ‘nc’ [-Wunused-variable] int n,b,c,i,j,x=0,nc=0,vf=0; ^