题解 | #计算一个数的阶乘#
计算一个数的阶乘
https://www.nowcoder.com/practice/b0423a89826c4d68a3e8b9832a6a1f49
#include <iostream>
using namespace std;
int main(){
int n;
cin>>n;
long long sum=1;
if(n>=1 && n<=20){
for(int i=1; i<=n; i++){ sum *=i;}
}
cout<<sum;
return 0;
}
