ccalc

ccalc is a command-line calculator written in C, created as a small exercise to understand the use of function pointers and modularity in C.

---

What does this project solve?

ccalc provides a quick and lightweight way to perform basic arithmetic operations directly in the terminal. It is useful for testing simple calculations without relying on heavy GUIs.

---

How to run

git clone https://github.com/geovannewashington/ccalc
cd ccalc
make
./bin/ccalc

Options:

• --no-banner: disables the ASCII banner

Currently, the calculator only supports 4 basic operations (addition, subtraction, multiplication, division) and works with two operands (lhs and rhs).

How to install

Compile from source:

git clone https://github.com/geovannewashington/ccalc.git
cd ccalc
make
sudo make install   # optional: installs the binary

Or download precompiled binaries from the Release page

⚠️ Currently, the project has only been tested on Linux.

Why is this project interesting?

• Demonstrates modularity in C
• Allows easy addition of new operations (pull requests welcome!)
• Introduces function pointers and command-line argument parsing
• Implements error handling and input validation
• Uses ANSI colors for a better terminal experience

Technologies and concepts applied

• C (C11) – pointers, functions, and memory management
• Modular programming – separate header and implementation files
• Makefile – automates compilation and binary generation
• Command-line argument parsing – flexible usage
• ANSI colors – improved terminal output
• Error handling – program robustness