HDU -- u Calculate e

u Calculate e

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 18822    Accepted Submission(s): 8211

Problem Description

A simple mathematical formula for e is



where n is allowed to go to infinity. This can actually yield very accurate approximations of e using relatively small values of n.

 

Output

Output the approximations of e generated by the above formula for the values of n from 0 to 9. The beginning of your output should appear similar to that shown below.

 

Sample Output

n e- -----------0 11 22 2.53 2.6666666674 2.708333333

[cpp] view plaincopy

1. //杭电1012  
2. #include <stdio.h>  
3. int main (int argc, char **argv)  
4. {  
5.   
6.     printf("n e\n");  
7.     printf("- -----------\n");  
8.     printf("0 1\n");  
9.     printf("1 2\n");  
10.     printf("2 2.5\n");  
11.     double result = 2.5 ;  
12.     double p = 0.5;  
13.     for (int i = 3; i <= 9; ++ i )  
14.     {  
15.         p /= i;  
16.         result += p;  
17.         printf("%d %.9f\n", i , result);  
18.     }  
19.     return  0;  
20. }