Make array of values and return the array address as long. 
simple example:
void main()
{
 int a[10],i,n;
 int *new_value_array;
 printf("\n Enter how many number you want to enter? ");
 scanf("%d",&n);
 for(i=0;i<n;i++)
 sacnf("%d",&a[i]);
 printf("\n old value of the array is:");
 for(i=0;i<n;i++)
 printf("\t%d",a[i]);
 new_value_array = array_modify(a,n);
 printf("\n new value of the array is: \n");   
 for(i=0;i<n;i++)
 printf("\t%d",*(new_value_array+i));
 getch();
}
 int *array_modify(int a[10],int n)
{
 int i;
 for(i=0;i<n;i++)
 a[i]=a[i]*4;
 return(a);
}