C语言解答

#include<stdio.h>
int main()
{
	int a,b,c,d;
	b=0;
	for(c=1;c<7;c++)
	{
		a=1;
		d=c;
		while(--d)
		{
			a=a*d;
		}
		b+=a;
	}
	printf("%d\n",b-1);
	return 0;
}

C++解答

#include<iostream>
#include<cstdio>
#include<iostream>
#include<cmath>

using namespace std;

int main(){
    int sum=0,temp=1;
    for(int i=1;i<=5;i++){
        temp *= i;
        sum += temp;
        //cout<<sum<<endl;
    }
    cout<<sum<<endl;
    return 0;
}

Python解答

# coding=utf-8
def jc(n):
    if n == 1 :
        return 1 
    else:
        return n*jc(n-1)
s = 0
for i in range(1,6):
    s += jc(i)
print(s)