简单题

#include 
      
       #include 
       
        #include 
        
         #include 
         
          using namespace std;#define pi 3.1415927int revolution;double travel_time, diameter;int main(){    int t = 0;    while (scanf("%lf%d%lf", &diameter, &revolution, &travel_time), revolution)    {        t++;        double distance = revolution * pi * diameter / 12 / 5280;            double mph = distance * 3600 / travel_time;        printf("Trip #%d: %.2f %.2f\n", t, distance, mph);    }    return 0;}