Find the radius of circle

#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
clrscr();
float area;
int ch,r;
{
cout<<"\nEnter radius of a circle:";
cin>>r;
area=3.14*r*r;
}
cout<<"area="<<area;
getch();
}

Output:
Enter radius of a circle:23
area=1661.060059