对于给定的正整数N，需要你计算 S=1!+2!+3!+...+N!。pta

以下是C语言的代码实现：

#include <stdio.h>

int factorial(int n);

int main(void) {
    int n, sum, i;
    scanf("%d", &n);
    sum = 0;
    for (i = 1; i <= n; i++) {
        sum += factorial(i);
    }
    printf("%d", sum);
    return 0;
}

int factorial(int n) {
    int i, m;
    m = 1;
    for (i = 1; i <= n; i++) {
        m *= i;
    }
    return m;
}

以下是Python的代码实现：

def factorial(n):
    if n == 1:
        return 1
    else:
        return n * factorial(n-1)

n = int(input())
sum = 0
for i in range(1, n+1):
    sum += factorial(i)
print(sum)