Compilare: user.cpp: In function ‘int main()’: user.cpp:19:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, k,t, nr=0, x1p,y1p,r1p, x2p,y2p,r2p; ^ user.cpp:19:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k,t, nr=0, x1p,y1p,r1p, x2p,y2p,r2p; ^ user.cpp:19:20: warning: unused variable ‘nr’ [-Wunused-variable] int i, j, k,t, nr=0, x1p,y1p,r1p, x2p,y2p,r2p; ^