Compilare: user.cpp: In function ‘void push(int)’: user.cpp:12:17: warning: unused variable ‘i’ [-Wunused-variable] int i, st, dr; ^ user.cpp:12:20: warning: unused variable ‘st’ [-Wunused-variable] int i, st, dr; ^ user.cpp:12:24: warning: unused variable ‘dr’ [-Wunused-variable] int i, st, dr; ^ user.cpp: In function ‘int main()’: user.cpp:54:39: warning: operation on ‘n’ may be undefined [-Wsequence-point] a[++m]=x; h[++n]=n; poz[m]=n; ^ user.cpp: In function ‘void del(int)’: user.cpp:30:38: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (ok==false && i*2<=n) ^