[Ｃ++] 96考古題 - e^x

[sb0917 (バカ)]

#include <iostream>
#include <iomanip>
using namespace std;

double eulerNumber(double );

int main()
{
    for(double i=1;i<=10;i++)
    {
        cout << "e^"  << setw(2) << (int)i << " = "
             << setprecision(10) <<fixed
             << eulerNumber(i) << endl;
    }

    system("pause");
    return 0;
}

double eulerNumber(double x)
{
    double sum = 1,level,y = 1;

    for(double i=1;i<100;i++)
    {
        level = 1;             //記得要設定不然階層會噴掉

        for(double j=1;j<=i;j++)
            level *= j;

        sum = (y*x)/level + sum;
        y *= x;
    }
    return sum;
}

--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.7.59
※ 編輯: sb0917          來自: 140.112.7.59         (11/19 21:23)