2016 省热身赛 Cylinder Candy

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.

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)

For each case, print the volume and surface area of the candy in one line. The relative error should be less than 10^-8.

2
1 1 1
1 3 5

32.907950527415 51.155135338077
1141.046818749128 532.235830206285
本题目表示没学过，，这个题目积分1个多小时，发现没学过。。。这个方法。。
还是数学专业的好。。

#include<stdio.h>  
#include<math.h>  
#define PI acos(-1.0)  
int main()  
{  
    int T;  
    scanf("%d",&T);  
    while(T--)  
    {  
        double r,h,d;  
        double v,s;  
        scanf("%lf%lf%lf",&r,&h,&d);  
        v=PI*PI*r*d*d+4.0/3*PI*d*d*d+2*PI*r*r*d+PI*h*((d+r)*(d+r));  
        s=2*(PI*PI*r*d+2*PI*d*d+PI*r*r+PI*h*(r+d));  
        printf("%.12lf %.12lf\n",v,s);  
  
    }  
    return 0;  
}