Cuts the cake
Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2541 Accepted Submission(s): 1616
Problem Description
Ice cream took a bronze medal in the Beijing match. Liu sir is very very happy. So he buys a cake for them. kiki is a child who likes eating, so the task of cuting cake was given to kiki. kiki is also a mischievous child. She wants
to cut the cake in a different way. This is introduced in the figure below.
But there is a difficult problem.which is how to make each preson get equally many cake. kiki is not good at match, so she wants you help her solve this problem.
Input
Input contains multiple test cases. Each line is a case. Each case contains only one integer R which is the radius. The input is terminated with a R of 0.
Output
For each test case, you should printf two numbers r2 and r1 in a line, accurate up to 3 decimal places, separate them by one space.
Sample Input
Sample Output
5.774 8.165
8.660 12.247
2.887 4.082
14.434 20.412
AC CODE:
include<stdio.h>
#include<math.h>
//#define pi 3.1415926
int main()
{
double r; //如果r爲int型,計算結果會誤差很大
double r1,r2;
while(~scanf("%lf",&r),r)
{
r1=sqrt(r/3*r);
r2=sqrt(2*r/3*r);
printf("%.3lf %.3lf\n",r1,r2);
}
return 0;
}