Compilare: user.cpp: In function ‘int main()’: user.cpp:9:9: warning: unused variable ‘i’ [-Wunused-variable] int i,n,x,y,m,st,dr,r,r2; ^ user.cpp:9:11: warning: unused variable ‘n’ [-Wunused-variable] int i,n,x,y,m,st,dr,r,r2; ^ user.cpp:9:19: warning: unused variable ‘st’ [-Wunused-variable] int i,n,x,y,m,st,dr,r,r2; ^ user.cpp:9:22: warning: unused variable ‘dr’ [-Wunused-variable] int i,n,x,y,m,st,dr,r,r2; ^