文章标题

1.#include
2.using namespace std;
3.int main()
4.{
5. double s=0,m=-1;
6. int i,n=9;
7. for(i=1;i<=n;i++)
8. {
9. m=-m*i;
10. s+=1.0/m;
11. }
12. cout<<”1-1/2!+1/3!-1/4!+1/5!-……+1/9! =”<