Calculate the average of N numbers in the index group of X, and return the number that is less than the average and closest to the average through formal parameters

#include<stdio.h>
#include<stdlib.h>
#define N 10
double fun(double x[],double *av);
int main()
{
    
	 int i;
	 double x[N],av,m;
	 for(i=0;i<N;i++)
	 {
    
	 	 x[i]=rand()%50;
	 	 printf("%4.0f",x[i]);
	 }
	 printf("\n");
	 m=fun(x,&av);
	 printf("\nthe average is:%f\n",av);
	 printf("m=%5.1f",m);
	 printf("\n");
 } 
double fun(double x[],double *av)
{
    
	 int i,j;
	 double d,s;
	 s=0;
	 for(i=0;i<N;i++)
	 {
    
	 	 s=s+x[i];
	 }
	 *av=s/N;
	 d=32767;
	 for(i=0;i<N;i++)
	 {
    
		   if(x[i]<*av&&*av-x[i]<=d)
	 	 {
    
	 	 	 d=*av-x[i];
	 	 	 j=i;
		  }
	 }
	 return x[j];
}