💻 Project 1 – Sphere Calculator (in C)

This is Project 1 in a series of mini exercises for beginners learning C programming. Each project in the series helps you practice essential programming concepts such as variables, user input/output, mathematical formulas, and the use of standard libraries.

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📌 About this project

This mini project is a sphere calculator, designed to compute the 2D area of a circle, the 3D surface area, and the volume of a sphere based on a given radius.

The program prompts the user to enter the radius of the sphere, and then uses well-known mathematical formulas to calculate:

• The area of a circle (2D projection)
• The surface area of the sphere (3D)
• The volume of the sphere

This exercise is ideal for reinforcing the use of math.h, especially the pow() function, and for practicing mathematical expressions and formatted output in C.

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📘 Formulas used

The following formulas are used in this project:

🔵 2D – Circle Area:

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🟣 3D – Volume of a Sphere:

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🧪 Example Output

Here is a sample of what the final terminal output should look like when the program is run:

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🧠 Challenge Instructions

If you'd like to practice building this yourself before reviewing the solution, here’s how to get started:

1. Prompt the user to enter the radius of a sphere.
2. Use the pow() function to apply the formulas for:
   • Area of the circle (2D)
   • Surface area of the sphere (3D)
   • Volume of the sphere
3. Print all results clearly, formatted to two decimal places and with appropriate units.

Note: This project is already complete and includes the full solution. You can explore the code in main.c and refer to the example images above for guidance.

Happy coding! 🚀