HDU 1012 u Calculate e

光输出，注意格式

 

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;

int main()
{

   // freopen("C:\\Users\\super\\Documents\\CB_codes\\in.txt", "r", stdin);
    //freopen("C:\\Users\\super\\Documents\\CB_codes\\out.txt","w",stdout);

    printf("n e\n");
    printf("- -----------\n");
    double e = 0;
    int f[10];
    f[0] = 1;
    for(int i = 1; i < 10; i ++ ) {
        f[i] = f[i-1] * i;
     //   printf("%d\n",f[i]);
    }
    for(int i = 0; i < 10; i ++ ) {
        e += (1.0 / f[i]);
        if(i > 2)
            printf("%d %.9lf\n",i,e);
        else
            printf("%d %lg\n",i,e);
    }


    fclose(stdin);
    return 0;
}