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Basic C Program

Program to find Diameter , Area and Perimeter of the Circle

Input - Output

Input
Enter radius of the circle: 4

Output
Diameter of the circle = 8

Area of circle =50.24

Perimeter of circle = 25.12

Algorithm

Step 1: START

Step 2: Enter radius of the circle.

Step 3: calculate diameter i.e (2*radius).

Step 3: calculate area i.e (3.14*radius*radius).

Step 3: calculate perimeter i.e (2*3.14*radius*).

Step 5: END

CODE


/* Area and Perimeter of the Circle */

#include  <stdio.h>
#define PI 3.14
int main()
{
      int radius,diameter;
      float area,perimeter;
      printf("Enter the radius of the circle : ");
      scanf("%d",&radius);
      diameter=2*radius;
      area= PI*radius*radius;
      perimeter= 2*PI*radius;
      printf("Diameter of the circle = %d\n",diameter);
      printf("Area of circle = %.2f\n",area);
      printf("Perimeter of circle = %.2f",perimeter);
    return 0;
}


/* Area and Perimeter of the Circle */

#include  <iostream>
#define PI 3.14
using namespace std;
int main()
{
      int radius,diameter;
      float area,perimeter;
      cout<<"Enter the radius of the circle : ";
      cin>>radius;
      diameter=2*radius;
      area= PI*radius*radius;
      perimeter= 2*PI*radius;
      cout<<"Diameter of the circle = "<<diameter<<"\n";
      cout<<"Area of circle = "<<area<<"\n";
      cout<<"Perimeter of circle = "<<perimeter<<"\n";;
    return 0;
}

OutPut

Enter radius of the circle: 4

Diameter of the circle = 8
Area of circle =50.24
Perimeter of circle = 25.12

Recommendation

1. Basic C program.
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3. Program based on Loops
4. Program based on Conversion
5. Program based on Pattern