import java.io.*;

class Numbers8
{
// Demonstrating "higher order functions" in Java - zip

   static final int SENTINEL = -999;
   static final int MAXNUMS = 100;

   public static void main (String[] args) throws IOException
   {
    int [] data1,data2,data3,data4;
    int count,n;
    BufferedReader in = Text.open(System.in);
    data1 = new int[MAXNUMS];
    System.out.println("First array: ");
    for(count=0; ;count++)
       {
        System.out.print(" Enter number "+(count+1)+" (or ");
        System.out.print(SENTINEL+" to finish): ");
        n=Text.readInt(in);
        if(n==SENTINEL)
           break;
        data1[count]=n;
       }
    System.out.println("The numbers entered were:");
    NumberOps.printall(data1,count);
    data2 = new int[count];
    System.out.println("Second array: ");
    for(int i=0; i<count ; i++)
       {
        System.out.print(" Enter number "+(i+1)+": ");
        n=Text.readInt(in);
        data2[i]=n;
       }
    System.out.println("The numbers entered were:");
    NumberOps.printall(data2,count);
    data3 = Higher.zip(new Product(),data1,data2,count);
    System.out.println("Zipping the arrays with product gives:");
    NumberOps.printall(data3,count);
    data4 = Higher.zip(new Diff2Squares(),data1,data2,count);
    System.out.print("Zipping the arrays with difference ");
    System.out.println("of two squares gives:");
    NumberOps.printall(data4,count);
   }
}