#include<iostream.h>
#include<conio.h>
{
return(r /2);
}
inline float circlearea(float r)
{
return(3.14*r*r);
}
inline float circumference(float r)
{
return(3.14*2*r);
}
int main()
{
float radius;
clrscr();
cin>>radius;
cout<<"\nDiameter of Circle:"<<
dimeter(radius);
cout<<"\nArea of Circle:"<< circlearea
(radius);
cout<<"\nCircumference of Circle:"<<
circumference(radius);
getch();
return 0;
}