question about polynomial multiplication
- by davit-datuashvili
i know that horners method for polynomial pultiplication is faster but here i dont know what is happening here is code
public class horner{
public static final int n=10;
public static final int x=7;
public static void main(String[] args){
//non fast version
int a[]=new int[]{1,2,3,4,5,6,7,8,9,10};
int xi=1;
int y=a[0];
for (int i=1;i<n;i++){
xi=x*xi;
y=y+a[i]*xi;
}
System.out.println(y);
//fast method
int y1=a[n-1];
for (int i=n-2;i>=0;i--){
y1=x*y+a[i];
}
System.out.println(y1);
}
}
result of this two methods are not same
result of first method is
462945547
and result of second method is
-1054348465
please help
