zoj 1113 u Calculate e

#include <iostream>#include <iomanip>#include <stdio.h>using namespace std;const int N = 9;int factorial(int n){    if(n == 0)        return 1;    return n * factorial(n - 1);}int main(){    cout << "n e" << endl;    cout << "- -----------" << endl;    double result = 0.0f, temp;    for(int i = 0; i <= N; ++i)    {        result = 0.0f;        for(int j = i; j > -1; --j)        { result += 1.0 / factorial(j);        }        if(i > 2)        { printf("%d %.9fn", i, result);        }        else        { cout << i << " " << result << endl;        }    }    return 0;}