Compilare: user.cpp: In function ‘int main()’: user.cpp:28:11: warning: unused variable ‘n’ [-Wunused-variable] int p,n,fives,pp,ok=1; ^ user.cpp:28:13: warning: unused variable ‘fives’ [-Wunused-variable] int p,n,fives,pp,ok=1; ^ user.cpp:28:19: warning: unused variable ‘pp’ [-Wunused-variable] int p,n,fives,pp,ok=1; ^ user.cpp:28:22: warning: unused variable ‘ok’ [-Wunused-variable] int p,n,fives,pp,ok=1; ^ user.cpp:8:5: warning: ‘mid’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=5;i<=a;i=i+5) ^ user.cpp:30:19: note: ‘mid’ was declared here int st=1,dr=9,mid; ^