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我已經做了以下程序來計算在Java中使用BigInteger的n個整數的階乘,但總是給出1作爲結果。錯誤在哪裏?因子程序沒有給出正確的輸出
import java.math.BigInteger;
import java.io.*;
class Factorial
{
public static void main(String args[])
{
try
{
int key;
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
BigInteger result=new BigInteger("1");
//take the quantity of elements for which factorial is to be calculated
int num=Integer.parseInt(br.readLine());
while(num-->0)
{
//input the number for which factorial is to be calculated
key=Integer.parseInt(br.readLine());
while(key>0)
{
System.out.println(key+""+result);
result.multiply(BigInteger.valueOf(key));
key--;
}
//again make the result back to 1 for next key element
result=new BigInteger("1");
}
}catch(Exception e)
{
//do nothing
}
}
}
感謝它的工作。我實際上忘了分配結果,因爲你提到。 –
好!別客氣。 – Masudul