Question

Write a program using variables to find the area and circumference of a circle whose radius is 12 e m Note that: Area of a circle-r Circumference of a circle=2nr​

Answer 1

Answer:

#include <stdio.h>

int main()

{

int circle_radius;

float PI_VALUE=3.14, circle_area, circle_circumf;

//Ask user to enter the radius of circle

printf("\nEnter radius of circle: ");

//Storing the user input into variable circle_radius

scanf("%d",&circle_radius);

//Calculate and display Area

circle_area = PI_VALUE * circle_radius * circle_radius;

printf("\nArea of circle is: %f",circle_area);

//Caluclate and display Circumference

circle_circumf = 2 * PI_VALUE * circle_radius;

printf("\nCircumference of circle is: %f",circle_circumf);

return(0);

}

Explanation:

output: Enter radius of circle: 2

Area of circle is: 12.560000

Circumference of circle is: 12.560000