欧拉拉

未分类

1. 应该比较精准，九位之后就不好说了

#include <stdio.h>
#include <stdlib.h>
unsigned long  int  factorial (unsigned long  int n);
double main()
{
    int n = 1;
    int result = 1;
    double e = 1.0;
    for (n = 1; n <= 12; n++)
    {
        result =(double) factorial (n);
        e = e + (1.0 / result);
        printf("%lf\n",e);
    }
    printf("%.9lf",e);
}
unsigned long  int  factorial (unsigned long  int n)
{
    if (n == 1)
        return 1;
    else return n *  factorial (n - 1);
}

在此输入正文