Why does these functions behave diffrently ?

Question

#include <stdio.h>
void fun(int* p) {
    *p = 10;
}
void fun1(int *p) {
    int a = 10;
    p = &a;
}
int main() {
    int x = 30;
    int *p = &x;
    fun1(p);
    printf("%d\n",*p); // output = 30
    fun(p);
    printf("%d",*p); // output = 10
}

Comments

https://gateoverflow.in/65830/pointers

---

fun1() is assigning local varibale a's address to its local pointer p, all these does not have any effect after fun1() returns.

But inside fun() we have changed the x value (in the main() ) pointed by p (although local).