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问题描述
因此,请考虑以下程序段!我尝试使用基本的递归函数来确定数字的阶乘,但是现在使用BigInteger类.
So consider the following program-segment! I've tried to use the basic recursion function to determine the factorial of a number, but now using the BigInteger class.
public static BigInteger fact(int a)
{
BigInteger factorial = BigInteger.ONE;
BigInteger factz = BigInteger.ONE;
if(a == 1)
{
return factorial;
}
else
{
return factz.multiply(fact(a-1));
}
}
因此,当我尝试在程序中实现此功能时,它会将输出返回为1.是否是因为BigInteger对象是不可变的?还是我在这里想念东西?
So when I try implementing this in a program, it returns the output as 1. Is it because BigInteger objects are immutable? Or am I missing something here?
推荐答案
代码中有错误,您应该输入
There's an error in the code, you should put
BigInteger factz = BigInteger.valueOf(a);
而不是BigInteger factz = BigInteger.ONE;
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