Question

How to write a C progeramme for calculating area of two concentric circles?​

Answer 1

Explanation:

#include<stdio.h>

#include<conio.h>

#define pi 3.14

void main()

{

float r1,r2,a1,a2,area;

printf("enter the radius of large circle");

printf("%f",&r1);

printf("enter radius of small circle");

scanf("%f",&r2);

a1=pi*r1*r1;

a2=pi*r2*r2;

area=a1-a2;

printf("the area of the first circle is :%.2f",a1);

printf("\n the area of second circle is:%.2f",a2);

printf("\n the area between two circles is:%.2f",area);

getch();

}