c++程序1!+3!+5!+..+n!的和的代码

以下是C++程序实现1!+3!+5!+...+n!的和的代码：

#include <iostream>
using namespace std;

int main() {
    int n, sum = 0, fac = 1;
    cout << "请输入n的值：";
    cin >> n;
    for (int i = 1; i <= n; i += 2) {
        fac = 1;
        for (int j = 1; j <= i; j++) {
            fac *= j;
        }
        sum += fac;
    }
    cout << "1!+3!+5!+...+n!的和为：" << sum << endl;
    return 0;
}