大数值

API

java.math.BigInteger

BigInteger add(BigInteger other)

BigInteger subtract(BigInteger other)

BigInteger multiply(BigInteger other)

BigInteger divide(BigInteger other)

BigInteger mod(BigInteger other)

int compareTo(BigInteger other)

static BigInteger valueOf(long x)

import java.math.BigInteger;
import java.util.Scanner;


public class BigIntegerTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Scanner in = new Scanner(System.in);
        
        System.out.print("How many numbers do you need to draw?");
        int k = in.nextInt();
        
        System.out.print("What is the highest number you can draw?");
        int n = in.nextInt();
        
        BigInteger lotteryOdds = BigInteger.valueOf(1);
        
        for(int i = 1;i<k;i++) {
            lotteryOdds = lotteryOdds.multiply(BigInteger.valueOf(n-i+1)).divide(BigInteger.valueOf(i));
            
            System.out.println("your odds are 1 in "+lotteryOdds+".Good luck!!");
        }
    }

}