Area and Volume of Sphare

Area and Volume of Sphare

#include<stdio.h>
#include<conio.h>
#define P1 3.14
void main()
{
clrscr();
int D;
float surface,volume;
surface=P1*D*D;
volume=(P1*D*D*D)/6.0;
printf("Surface Area=%.2f\n",surface);
printf("Volume=%.2f",volume);
getch();
}