Question

Write a function that calculates the area of a circle when its circumference, c, is given. This function should call a second nested function that returns the radius, r, of the circle given c. The relevant formulas are r = c/2π and a = πr². Write a C program that accepts the value of the circumference from the user, calculates the radius and area, and displays the calculated values from within the main function. Your program should use the functions written above.

Answer 1

To write a C program that calculates the area of a circle given its circumference, you can use two functions: calculateRadius and calculateArea. Here's how the program works: First, accept the circumference from the user. Then, call the calculateRadius function to calculate the radius. Next, call the calculateArea function to calculate the area. Finally, display the calculated values.

Step-by-step explanation:

To write a C program that calculates the area of a circle given its circumference, we can use two functions:

1. A function called calculateRadius that takes the circumference as input and returns the radius.
2. A function called calculateArea that takes the radius as input and returns the area of the circle.

Here's a step-by-step explanation of the program:

1. Inside the main function, accept the value of the circumference from the user.
2. Call the calculateRadius function, passing the circumference as an argument.
3. Inside the calculateRadius function, calculate the radius using the formula r = c / (2 * π) and return the value of the radius.
4. Back in the main function, call the calculateArea function, passing the radius as an argument.
5. Inside the calculateArea function, calculate the area using the formula a = π * r^2 and return the value of the area.
6. Finally, display the calculated values of the radius and area from the main function.