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): 24962 Accepted Submission(s): 11109

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 1 1 2 2 2.5 3 2.666666667 4 2.708333333

Source

Greater New York 2000

Recommend

JGShining

#include<stdio.h>
int main()
{
	int i,k=1;
	double e=1;
	printf("n e\n- -----------\n0 1\n1 2\n2 2.5\n");
	for(i=1;i<=9;i++)
	{
		k*=i;
		e+=1.0/k;
		if(i!=2&&i!=1)
		printf("%d %.9lf\n",i,e);
	}
	return 0;
}