Compilare: user.cpp: In function ‘int main()’: user.cpp:10:9: warning: unused variable ‘k’ [-Wunused-variable] int k,nr=0,aux=0,a,b,max=0,x,y; ^ user.cpp:10:11: warning: unused variable ‘nr’ [-Wunused-variable] int k,nr=0,aux=0,a,b,max=0,x,y; ^~ user.cpp:10:16: warning: unused variable ‘aux’ [-Wunused-variable] int k,nr=0,aux=0,a,b,max=0,x,y; ^~~ user.cpp:22:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<x<<" "<<y; ^ user.cpp:22:13: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<x<<" "<<y; ^~~