CALCULATE AREA OF CIRCLE

#include<stdio.h>
#include<conio.h>
#define pi 3.14
void main()
{
 float r,a;
 clrscr();
 printf("\n\tEnter Radiush : ");
 scanf("%f",&r);
 a=pi*r*r;
 printf("\n\t-----------------------");
 printf("\n\tInput Radiush : %.2f",r);
 printf("\n\tArea of Circle : %.2f",a);
 printf("\n\t-----------------------");
 getch();
}

Output

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