/*To determine area of circle*/
#include<stdio.h>
#include<conio.h>
#define PI 3.1416
void main()
{
clrscr();
int D;
float area;
printf("D=?");
scanf("%d",&D);
area=(PI*D*D)/4.0;
printf("Area of the circle=%.2d",area);
getch();
}
#include<stdio.h>
#include<conio.h>
#define PI 3.1416
void main()
{
clrscr();
int D;
float area;
printf("D=?");
scanf("%d",&D);
area=(PI*D*D)/4.0;
printf("Area of the circle=%.2d",area);
getch();
}
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