Menghitung Luas Segitiga

import java.util.Scanner;
public class LuasSegitiga
{
public static void main(String[] args)
{
Scanner input = new Scanner (System.in);
int a, t;
double luas;
System.out.print("Nilai Alas = "); a = input.nextInt();
System.out.print("Nilai Tinggi = "); t = input.nextInt();
luas = (a*t)/2;
System.out.printf("Luas Segitiga = " +luas);
}
}