?? lotteryodds.java
字號(hào):
/**
* @version 1.00 07 Feb 1996
* @author Cay Horstmann
*/
import corejava.*;
public class LotteryOdds
{ public static long lotteryOdds(int high, int number)
{ long r = 1;
int i;
for (i = 1; i <= number; i++)
{ r = r * high / i;
high--;
}
return r;
}
public static void main(String[] args)
{ int numbers = Console.readInt
("How many numbers do you need to draw?");
int topNumber = Console.readInt
("What is the highest number you can draw?");
long oddsAre = lotteryOdds(topNumber, numbers);
System.out.println
("Your odds are 1 in " + oddsAre + ". Good luck!");
}
}
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