HDU 1012 u Calculate e 水题 基础题
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u Calculate e
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 43467 Accepted Submission(s): 19919
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.
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
Source
Greater New York 2000
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基础题,水题,一开始在纠结牵前两个的输出格式怎么控制,想了半天,还i交了一遍,嗯,最后选择了直接输出,因为后面都是9位 很好控制了
ac代码
#include <iostream>#include <cstdio>using namespace std;int main(){double a[15]={1.0,2.0,2.5};double jie[15]={1.0,1.0};int i,j;for(i=2;i<=10;i++)jie[i]=jie[i-1]*i;for(i=2;i<=10;i++){a[i]=a[i-1]+(1.0/jie[i]);}printf("n e\n");printf("- -----------\n");printf("0 1\n");printf("1 2\n");printf("2 2.5\n");for(i=3;i<10;i++){printf("%d %.9lf\n",i,a[i]);}return 0;}
1 0
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