为什么有这么多错啊？
#include<iostream.h>#include<math.h>
#define PI 3.1415926;
int main()
{
float r,h,l,s1,s2,v1,v2;
cin>>r>>h;
l=2*PI*r;
s1=PI*r*r;
s2=4*PI*r*r;
v1=4/3*PI*r*r*r;
v2=PI*r*r*h;
cout<<l<<endl;
cout<<s1<<endl;
cout<<s2<<endl;
cout<<v1<<endl;
cout<<v2<<endl;
return 0;
}
