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course（递归专题）求n!的值

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James
2020-04-24 13:43:31 +08:00
parent f837682d3a
commit af24f23707
8 changed files with 57 additions and 0 deletions
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# <20><><EFBFBD><EFBFBD>
* <20><><EFBFBD><EFBFBD>

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# <09><><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><C5A1><EFBFBD><EFBFBD>ݹ<EFBFBD>ר<EFBFBD>⣩<EFBFBD><E2A3A9>n!<21><>ֵ
[<5B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>]
<EFBFBD><EFBFBD>ѧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õݹ麯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣡
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>n!=1*2*...*n<><6E><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5!=1*2*3*4*5=120<32><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>n!<21><><EFBFBD><EFBFBD>
[<5B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ]
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>n<EFBFBD><EFBFBD><EFBFBD><EFBFBD> n <= 15 <20><>
[<5B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ]
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>n!<21><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
[<5B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>]
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[<5B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>]
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//<2F>׳ˣ<D7B3><CBA3><EFBFBD>С<EFBFBD><D0A1>
#include <iostream>
using namespace std;
long long dg(long long n){
if(n==1){
return 1;
}
return n+dg(n-1);
}
int main()
{
int n;
cin>>n;
cout<<dg(n);
}

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## z:\Chao\src\1659_n!\test\in.txt
2020/04/24 <20><><EFBFBD><EFBFBD> 13:42:16.59
1
-----------------------------------------------
Process exited after 190 ms with return value 0
## z:\Chao\src\1659_n!\test\in2.txt
2020/04/24 <20><><EFBFBD><EFBFBD> 13:42:16.59
1307674368000
-----------------------------------------------
Process exited after 100 ms with return value 0
## z:\Chao\src\1659_n!\test\in3.txt
2020/04/24 <20><><EFBFBD><EFBFBD> 13:42:16.59
24
-----------------------------------------------
Process exited after 110 ms with return value 0