为了账号安全，请及时绑定邮箱和手机立即绑定

课程

/后端开发

/C

/C语言入门

求解释，，

求大神，没有确定n的初始值，为什么会自动填充？

仙剑莫一兮

2016-10-11

源自：C语言入门  5-8

关注问题 我要回答
670
操作
收起

正在回答

5 回答

源远流长d 回答被采纳 +3 积分
2016-10-19

先看下例题的解释：

factorial阶乘的意思，比如说4阶乘，就是1*2*3*4=24，则24为4的阶乘；阶乘用“！”表示，而数学上定义，

0！=1，1！也等于1.

回归正题

result=factorial(n-1)*n;   n先为5,所以result=factorial(4)*5我们要求这个值，但factorial(4)我们也不知道这个值，那么也要求它，可以把4也带进去为factorial(3)*4......

以下列表

factorial（4）*5  

                /\

factorial (3)*4

               /\

factorial(2)*3

              /\

factorial(1)*2

              /\

factorial(0)*1  //可省略factorial(0)=factorial(1);

递 （往下）                   归（往上）


1 回复 有任何疑惑可以回复我~
收起回答
#1

仙剑莫一兮 提问者

非常感谢！
2016-10-20 回复 有任何疑惑可以回复我~
qq_慕神1420022
2022-04-01

我也带着这样的疑问?我在我的谷歌浏览器中，会选中下面的p标签，div标签不会选中

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源远流长d
2016-10-19

定义初始值为一，运算num = (getPeachNumber(n+1)+1)*2;

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源远流长d
2016-10-12

int num = getPeachNumber(1);        下面int main不是定义了吗？

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#1

夏析

这句什么意思 搞不懂
2016-10-19 回复 有任何疑惑可以回复我~
慕粉1721506088
2016-10-11

如果没有指定值，那默认就是随机值

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