C++实现阶乘求和（1!+2!+3!+...+N!）的完整代码

```cpp #include <iostream> using namespace std; // 📝 计算阶乘的函数 long long factorial(int n) { long long result = 1; for (int i = 1; i <= n; i++) { result *= i; } return result; } // 📝 计算阶乘和的函数 long long sumOfFactorials(int N) { long long sum = 0; for (int i = 1; i <= N; i++) { sum += factorial(i); } return sum; } int main() { int N; cin >> N; long long result = sumOfFactorials(N); cout << result << endl; return 0; } ``` ######[AI问答 | 190点数解答 | 2026-07-20 20:38:38]