How to find area of circle in c...

comment line

/* area of circle */

#include <stdio.h>
#include <conio.h>

 void main()
{
 int radius,  area;
 printf(enter the radius of circle");
 scanf("%d", &radius);

 area  =  3.14 * radius * radius;
 printf("area of circle =%d",  area);
 getch();
}

now your code is done 
compile it and run it..