p-- -bad access

#include<stdio.h>

double power(double n,int p);

int main()

{double x,xpow;

int exp;

printf("enter a number and the integer power to which\nthe number will be raised. enter q to quit");

while((scanf("%lf%d",&x,&exp))==2)

{

    xpow=power(x,exp);

    printf("%.3f to the power %d is %.5f\n",x,exp,xpow);

    printf("enter next pair of numbers or q to quit\n");

}

printf("hope you enjoyed this power trip--bye!\n");

return 0;

}

double power(double n,int p)

{

    double pow=1;

    if(p>0)

        pow=n*(power(n,p-1));

    if(n!=0&&p<0)

    {

        p=abs(p);

        pow=(1/n)*(1/(power(n,p-1)));}

    if(n!=0&&p==0)

        pow=1;

    if(n==0&&p==0)

    {

        printf("undefined");

        pow=-1;

        

    }