我应该打印一个0到30之间的整数表以及它们的阶乘。我试过,但是我一直收到错误,说BigInteger(长)在BigInteger中有私人访问权限?想法?
public static void main(String[] args) {
int x = 0;
for (x = 0; x < 31;) {
System.out.println(x + " " + factorial(x));
x = x + 1;
}
}
/*
public static int factorial (int n) {
if (n == 0) {
return 1;
} else {
return n * factorial (n-1);
}
}
// error occuring at 13! could be because the number becomes too great for int to handle, resulting in an overflow error.
}*/
public static BigInteger factorial(int n) {
if (n == 0) {
return BigInteger.ONE;
} else {
BigInteger result = new BigInteger(n).multiply(factorial(n - 1));(error here)
return result;
}
//return new BigInteger(n) * factorial(n - 1);
}
答案 0 :(得分:1)
有一个BigInteger
构造函数使用long
,但它是private
所以只能从BigInteger
类本身调用。
您需要改为使用BigInteger.valueOf(n)
。