[解题报告]HDU 1012 u Calculate e
u Calculate e
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 21753 Accepted Submission(s): 9604
Problem Description
A simple mathematical formula for e is
![](http://acm.hdu.edu.cn/data/images/1012-1.gif)
where n is allowed to go to infinity. This can actually yield very accurate approximations of e using relatively small values of n.
![](http://acm.hdu.edu.cn/data/images/1012-1.gif)
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 1
1 2
2 2.5
3 2.666666667
4 2.708333333
Source
Recommend
JGShining
不要企图去算n=0;
#include<stdio.h> int main() { double i,j,x,s=1; printf("n e\n- -----------\n0 1\n"); for(i=1;i<10;i++) { printf("%lg ",i); x=1; for(j=1;j<=i;j++) x*=1/j; s+=x; if(i==8) { printf("%.9lf\n",s); continue; } printf("%.10lg\n",s); } return 0; }