Compilare: user.cpp: In function ‘int main()’: user.cpp:31:19: warning: unused variable ‘l’ [-Wunused-variable] int n,k,i,x,y,l,c,lat; ^ user.cpp:31:21: warning: unused variable ‘c’ [-Wunused-variable] int n,k,i,x,y,l,c,lat; ^ user.cpp:31:23: warning: unused variable ‘lat’ [-Wunused-variable] int n,k,i,x,y,l,c,lat; ^