如何快速算出阶乘的结果？

来源：百度知道 编辑：UC知道 时间：2024/09/24 10:04:57
如果我要算出9!的结果，有没有快速的算法？比如，公式什么的！

For numIndex As Integer = 2 To number
carry = 0
For arrayIndex = 0 To arrayTail
midProduct = product(arrayIndex) * numIndex + carry
carry = midProduct \ DIVISOR
product(arrayIndex) = midProduct - DIVISOR * carry
Next arrayIndex

Do While carry <> 0
product(arrayIndex) = carry Mod DIVISOR
carry = carry \ DIVISOR
arrayIndex += 1
Loop
arrayTail = arrayIndex - 1
Next numIndex