Which program p1 or p2 have error and why ? Plz.. explain ?

Question

P1
int main()
{
int (*ptr)(int) = fun ;
(*ptr)(3);
return;
}
int fun(int n)
{
for(;n>0;n--)
Printf("GeeksQuiz ");
return;
}

P2
int main ()
{
void demo ();
void (*fun)();
fun=demo;
(*fun)();
fun();
return 0;
}
void demo()
{
Printf("GeeksQuiz ");
}

Answer 1

In P2 is
fun = demo
Or
fun =&demo