Question

用C语言求1!+2!+3!+......10!

Answer 1

#include<stdio.h>
int main()
{
int n=1,k,i,s=0;
for(i=1;i<=10;i++)
{
for(k=i;k>0;k--)
{
n=n*i;
}
s=s+n;
}
printf("1!+2!+3!+......10!=%d\n",&s);
return 0;
}
有问题，可以追问

Answer 2

#include <iostream>
using namespace std;
void main()
{
long sum = 0;
for( long n = 1; n <= 10; n++ )
{
long product = 1;
for( long i = 1; i <= n; i++ )
product *= i;
sum += product;
}
cout << sum;
}

Answer 3

#include<stdio.h>
int main()
{
int i,temp,sum;
temp=1;
sum=0;
for(i=1;i<=3;i++)
{
temp*=i;
sum+=temp;
}
printf("%d\n",sum);
}

Answer 4

t=1!;s=0;
for(i=1 to 10)
s+=t*i;