C Program To Find The Area of Circle

/*  Find the area of circle */

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 #include<stdio.h>  
 #include<conio.h>  
 void main()  
 {  
   int r;  
   float area=0.0;  
   clrscr();  
   printf("Enter the radius of circle");  
   scanf("%d",&r);  
   area=3.14*r*r;  
   printf("Area of circle is: %f",area);  
   getch();  
 }