ZOJ 3866 Cylinder Candy(对体积和表面积 积分)
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Edward the confectioner is making a new batch of chocolate covered candy. Each candy center is shaped as a cylinder with radius r mm and height h mm.
The candy center needs to be covered with a uniform coat of chocolate. The uniform coat of chocolate is d mm thick.
You are asked to calcualte the volume and the surface of the chocolate covered candy.
Input
There are multiple test cases. The first line of input contains an integer T(1≤ T≤ 1000) indicating the number of test cases. For each test case:
There are three integers r, h, d in one line. (1≤ r, h, d ≤ 100)
Output
For each case, print the volume and surface area of the candy in one line. The relative error should be less than 10-8.
Sample Input
21 1 11 3 5
Sample Output
32.907950527415 51.1551353380771141.046818749128 532.235830206285
此二位大神讲得很好~积分对我还是个问题。。
http://blog.csdn.net/doris1104/article/details/45039015
http://blog.csdn.net/david_jett/article/details/45015343#reply
http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3866
#include <iostream> #include <cmath> #include <iomanip> #define pi 4*atan(1.0) using namespace std; int main() { int t,r,h,d; cin>>t; while(t--) { cin>>r>>h>>d; cout<<fixed<<setprecision(12)<<2*(2*d*d*d/3.0*pi+r*d*d*pi*pi/2)+pi*((r+d)*(r+d))*(h)+pi*(r*r)*2*d<<" "; cout<<fixed<<setprecision(12)<<2*(pi*pi*d*r+2*pi*d*d)+2*pi*r*r+2*pi*(r+d)*h<<endl; } return 0; }
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