POJ 1665

 #include<iostream>//chengdacaizi 08.11.12
 #include<iomanip>
 #define p 3.1415927
 using namespace std;
 int main()
 {
     int num=;
     double getdistance(double , int );
     double getspeed(double , double );
     double diameter;
     int revolutions;
     double time;
         double distance;
     double speed;
     while(){
     cin>>diameter>>revolutions>>time;
     if(revolutions==)
         break;
     distance = getdistance(diameter,revolutions);
     speed = getspeed(distance,time);
     cout<<"Trip #"<<num<<": "<<setiosflags(ios::fixed)<<setprecision()<<distance<<" "<<speed<<endl;
     num++;
     }
     return ;
 }
 double getdistance(double diameter,int revolution)
 {
    diameter/=;
    diameter*=p;
    diameter*=revolution;
    return diameter;
 }
 double getspeed(double distance, double time)
 {
     return distance/time*;
 }

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