// poj1517.cpp : Defines the entry point for the console application.//
#include "stdafx.h"#include <stdio.h>
double e(int n){ int k; int multi = 1;
if(n == 0) return 1; else { for(k=n;k>=2;k--) multi *= k; return (double)1/multi + e(n-1); }}
int main(){ int i; printf("n e/n"); printf("- -----------/n"); for(i=0;i<=9;i++) { printf("%d %.9f/n",i,e(i)); }
return 0;}
