-
Notifications
You must be signed in to change notification settings - Fork 0
/
euler.cpp
56 lines (52 loc) · 800 Bytes
/
euler.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
//José Luis Enríquez Flores
//A01630238
#include <cmath>
#include <iostream>
#include <cstdlib>
using namespace std;
int factorial(int n)
{
if (n==0)
{
return 1;
}
if (n>0)
{
int fact=1;
for (int i=2;i<=n;i++)
{
fact=fact*i;
}
return fact;
}
}
double floor(double e, int precision)
{
e *= pow(10, precision+1);
e = floor(e);
e /= pow(10, precision+1);
return e;
}
float calculate_e(int precision)
{
float e = 0.0;
float prevguess;
for(float n = 0.0 ;n < 100; n++)
{
prevguess = e;
cout << n << " " << prevguess << endl;
e += 1 / float (factorial(n));
if (floor(prevguess, precision) == floor(e, precision))
{
break;
}
}
return e;
}
int main()
{
int precision;
cin >> precision;
cout << endl << calculate_e(precision) << endl;
return 0;
}