Compilare: user.cpp: In function ‘int main()’: user.cpp:17:14: warning: statement has no effect [-Wunused-value] x1[i]+x1[i-1]; ^ user.cpp:22:14: warning: statement has no effect [-Wunused-value] y1[i]+y1[i-1]; ^ user.cpp:10:17: warning: unused variable ‘ok’ [-Wunused-variable] int n,m,i,j,ok,nr,tot,sum,a,sum2,max; ^ user.cpp:10:20: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int n,m,i,j,ok,nr,tot,sum,a,sum2,max; ^ user.cpp:26:12: warning: unused variable ‘k2’ [-Wunused-variable] int k1,k2,p,l,op; ^ user.cpp:26:15: warning: unused variable ‘p’ [-Wunused-variable] int k1,k2,p,l,op; ^ user.cpp:26:17: warning: unused variable ‘l’ [-Wunused-variable] int k1,k2,p,l,op; ^ user.cpp:26:19: warning: unused variable ‘op’ [-Wunused-variable] int k1,k2,p,l,op; ^