simpleC — Simple Calculator

A lightweight terminal calculator for quick everyday calculations.
Supports arithmetic expressions, parentheses, percentages, and unary minus.

Features

• Basic arithmetic: addition (+), subtraction (-), multiplication (*), division (/)
• Operator precedence: 2+3*4 equals 14, not 20
• Parentheses: (2+3)*4 for grouping expressions
• Unary minus: -5+3 for negative numbers at the start of expressions
• Percentages: 100+10% calculates 10% of 100 and adds it, giving 110
• REPL mode: interactive prompt for continuous calculations
• Error handling: clear messages for division by zero and syntax errors

Installation

Debian / Ubuntu / Linux Mint (.deb)

Download the latest .deb package from the Releases page and install it:

sudo dpkg -i simplec_1.0-1_amd64.deb

Or install from the terminal:

wget https://github.com/vladik50/simpleC/releases/download/v1.0/simplec_1.0-1_amd64.deb sudo dpkg -i simplec_1.0-1_amd64.deb

Fedora / RHEL / CentOS (.rpm)

Download the latest .rpm package from the Releases page and install it:

sudo dnf install simplec-1.0-1.fcXX.x86_64.rpm

Or using rpm directly:

sudo rpm -i simplec-1.0-1.fcXX.x86_64.rpm

Arch Linux / Manjaro (.pkg.tar.zst)

Download the latest .pkg.tar.zst package from the Releases page and install it:

sudo pacman -U simplec-1.0-1-x86_64.pkg.tar.zst

Build from Source

Requirements

• g++ (GCC) with C++17 support
• make

Compilation

Clone the repository and build with make:

git clone https://github.com/vladik50/simpleC.git
cd simpleC
make

Or compile manually:

g++ -std=c++17 -O2 -o simpleC simpleC.cpp

Install (optional)

sudo make install

This copies simpleC to /usr/local/bin. To uninstall:

sudo make uninstall

Usage

Launch the calculator:

./simpleC or simplec

You will see the >> prompt. Type an expression and press Enter.

Examples

Basic arithmetic:

>> 2+2
4
>> 10-3
7
>> 6*7
42
>> 15/3
5

Operator precedence:

>> 2+3*4
14
>> 10-8/2
6

Parentheses:

>> (2+3)*4
20
>> (10-5)*(2+3)
25

Unary minus:

>> -5+3
-2
>> 10+-3
7
>> 2*-4
-8

Percentages:

>> 100+10%
110
>> 200-15%
170
>> 50+20%-10%
54

Error handling:

>> 5/0
Error: division by zero
>> (2+3
Error: expected ')'
>> hello
Error: expected a number or '('

Exiting:

>> exit
Goodbye!

You can also use quit to exit.

License

GNU GPL v3.0 or later. See LICENSE for full text.