Programe For Find The Area of Circle

[rajeevmahura]

/* Programe For Find The Area of Circle */
#include<conio.h>
#include<stdio.h>
#include<math.h>
void main()
{
float radius,area;
clrscr();
printf("Enter The Radius of Circle:- ");
scanf("%f",&radius);
area=3.14*pow(radius,2);
printf("Area of Circle is:- %f",area);
getch();
}
/*
Input:- Enter The Radius of Circle:- 7

Output:- Area of Circle is:- 153.860001
*/

[manojthesingham]

#include<stdio.h>
#include<conio.h>
/*
int printf("format args",..,..,..);
printf("B",printf("A"));
prints A then B
but comma has more precedence
int i = (1,2); 2 is stored
*/
const double PI=223.0/71.0;
int main(int argc,char **argv)
{
int r;
printf("Area of Circle is %f ",PI*r*r,scanf("%d",&r,printf("Enter the Radius of Circle : ")));
getch();
return 1;
}