Calculate the average of N numbers in the group indexed by the formal parameter x, move the data less than the average in the group indexed to the front of the array, and move the data greater than or

#include<stdlib.h>
#include<stdio.h>
#define N 10
double fun(double *x);
int main()
{
    
	int i;
	double x[N];
	for(i=0;i<N;i++) 
	{
    
		  x[i]=rand()%50;
		  printf("%4.0f",x[i]);
	}
	printf("\n");
	printf("the average is:%f\n",fun(x));
	printf("\n the result:\n",fun(x));
	for(i=0;i<N;i++)
	{
    
		 printf("%5.0f",x[i]);
	}
	printf("\n");
}
double fun(double *x)
{
    
	int i,j;
	double y[N];
	double av=0;
	 for(i=0;i<N;i++)
	 {
    
	 	 av+=x[i]/N;
	 }
	 for(i=j=0;i<N;i++)
	 {
    
	 	 if(x[i]<av)
	 	 {
    
	 	 	 y[j]=x[i];
	 	 	 x[i]=-1;
	 	 	 j++;
		  }
	 }
	 i=0;
	 while(i<N)
	 {
    
	 	 if(x[i]!=-1)
	 	 y[j++]=x[i];
	 	 i++;
	 }
	 for(i=0;i<N;i++)
	 {
    
	 	 x[i]=y[i];
	 }
	 return av;
}