HDOJ 1012 u Calculate e(水题)
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u Calculate e
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 35564 Accepted Submission(s): 16038
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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然后我在讨论区看见这位仁兄的,震慑住我了:
#include<stdio.h>int main(){int n;double e,sum,ssum;printf("n e\n- -----------\n0 1\n1 2\n2 2.5\n");sum=2.5; ssum=2;for(n=3;n<10;n++){ssum*=n; //阶乘sum+=1/ssum; //求和printf("%d %.9lf\n",n,sum);}return 0;}
然后我在讨论区看见这位仁兄的,震慑住我了:
# include<stdio.h>int main(){printf("n e\n");printf("- -----------\n");printf("0 1\n1 2\n2 2.5\n");printf("3 2.666666667\n");printf("4 2.708333333\n");printf("5 2.716666667\n");printf("6 2.718055556\n");printf("7 2.718253968\n");printf("8 2.718278770\n");printf("9 2.718281526\n");return 0;}
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