Question

Question No. 100 :

Write a C - program to find out the area and perimeter of a circle. The radius will be taken as input.

Answer 1

Hey there !

Solution:

Coding is as follows:

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#include <stdio.h>

#include <conio.h>

#define PI 3.141

int main(){

   float radius, area;

   printf("Enter radius of circle\n");

   scanf("%f", &radius);

   /* Area of Circle = PI x Radius X Radius */

   area = PI*radius*radius;

   printf("Area of circle : %0.4f\n", area);

   

   getch();

   return 0;

}

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For output check Attachment !

Hope my answer helped !

Answer 2

Answer:

Explanation:

#include<iostream.h>//header file declaration

#include<conio.h>

void main()

{

clrscr() //clear screen command

int r;double a,p; //declaration of variables

cout<<"Enter the radius:";

cin>>r;

a=3.14*r*r;

p=2*3.14*r;

cout<<"\nArea of circle:"<<a;

cout<<"\nPerimeter of circle:"<<p;

getch(); //get character command

}

Hope you understood