soj 1050

pi要定义成浮点型

#include <iostream>#include <iomanip>using namespace std;const double pi = 3.1415927;const int a = 12*5280;int main(){    int N=1, revolutions;    double diameter,time,primeter;    while(cin>>diameter>>revolutions>>time&&revolutions!=0){        primeter = pi*diameter*revolutions/a;        time/=3600;        cout<<"Trip #"<<N++<<fixed<<setprecision(2)<<": "<<primeter<<" "<<primeter/time<<endl;    }}