Compilare: user.cpp: In function ‘int main()’: user.cpp:31:12: warning: unused variable ‘res’ [-Wunused-variable] int n,k,i,res=0,j,rez,mask; ^ user.cpp:31:18: warning: unused variable ‘j’ [-Wunused-variable] int n,k,i,res=0,j,rez,mask; ^ user.cpp:31:20: warning: unused variable ‘rez’ [-Wunused-variable] int n,k,i,res=0,j,rez,mask; ^ user.cpp:31:24: warning: unused variable ‘mask’ [-Wunused-variable] int n,k,i,res=0,j,rez,mask; ^