Exception in thread "main" java.lang.NullPointerException at Demo1.main(Demo1.java:14)
空指针异常???
有大神解决吗?
public class Demo1 { public static void main (String[] args){ final int NMAX=10; int [][]odds=new int[NMAX+1][]; for(int n=0;n<NMAX;n++) odds[n]=new int[n+1];
for (int n=0;n<odds.length;n++) for(int k=0; k<odds[n].length;k++){ //空指针异常 int lotteryOdds=1; for(int i=1;i<=k;i++) lotteryOdds=lotteryOdds*(n-i+1)/i; odds[n][k]=lotteryOdds; } for(int [] row:odds) { for (int odd:row) System.out.printf("%4d",odd); System.out.println(); } }