C语言编写函数fun求：1!+2!+3!+⋯⋯+n!的和的和

以下是C语言编写函数fun求1!+2!+3!+⋯⋯+n!的和的例子：

#include <stdio.h>

int factorial(int num) {
    int fact = 1;
    for (int i = 1; i <= num; i++) {
        fact *= i;
    }
    return fact;
}

int sumOfFactorials(int n) {
    int sum = 0;
    for (int i = 1; i <= n; i++) {
        sum += factorial(i);
    }
    return sum;
}

int main() {
    int n;
    printf("Enter the value of n: ");
    scanf("%d", &n);
    int result = sumOfFactorials(n);
    printf("The sum of factorials from 1 to %d is: %d\n", n, result);
    return 0;
}