Calculating the circumference and area of a circular table from an input value for its diameter. - C Data Type

C examples for Data Type:float

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Introduction

The formula to calculate circumference and area of a circle. 

circumference = 2pr and area = pr , where r is the radius.

Demo Code

#include <stdio.h>

int main(void)
{
  float radius = 0.0f;                  // The radius of the table
  float diameter = 0.0f;                // The diameter of the table
  float circumference = 0.0f;           // The circumference of the table
  float area = 0.0f;                    // The area of the table
  float Pi = 3.14159265f;

  printf("Input the diameter of a circle:");
  scanf("%f", &diameter);               // Read the diameter from the keyboard

  radius = diameter/2.0f;               // Calculate the radius
  circumference = 2.0f*Pi*radius;       // Calculate the circumference
  area = Pi*radius*radius;              // Calculate the area

  printf("\nThe circumference is %.2f", circumference);
  printf("\nThe area is %.2f\n", area);
  return 0;/*from www.jav a 2 s.  c  o  m*/
}

Result


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