(2)求阶乘和(求1到5阶乘的和)

Question

(2)求阶乘和(求1到5阶乘的和)。

Answer 1

#include<iostream>
using namespace std;

int main()
{
    double p=1,s=0.0;
    for (int i=1; i<=5;i++)
    {
        p=p*i;
        s=s+p;
    }
    cout<<s;

}