Scientific Calculator

Welcome to the Scientific Calculator GitHub repository! This project is a command-line scientific calculator that supports various mathematical functions and constants. It is designed to handle mathematical expressions such as "3*sin(21) - (22/11 +3)". It uses a recursive descent parsing (RDP) algorithm.

Features

1. Expression Format:
   • The calculator accepts input expressions of the form: "3*sin(21) - (22/11 +3)".
2. Commands:
   • config: Configure the calculator settings, including angle unit, notation, and float precision.
   • sconfig: Show the current configuration (e.g., RAD, Nrm, 4).
   • exit: Exit the calculator.
3. Math Functions:
   • sin: Sine function.
   • cos: Cosine function.
   • tan: Tangent function.
   • exp: Exponential function.
   • log: Logarithmic function.
   • sqrt: Square root function.
4. Constants:
   • C: Speed of light.
   • R: Universal gas constant.
   • G: Gravitational constant.
   • Me: Electron mass.
   • Mp: Proton mass.
   • Mn: Neutron mass.
   • E: Electron charge.
   • Na: Avogadro's number.
   • Vm: Molar volume of ideal gas.
   • ANS: Result of the last calculation.
   • PI: Mathematical constant Pi.

Getting Started

1. Clone the repository to your local machine:

   git clone https://github.com/A-Badiry/scientific-calculator.git

2. Navigate to the project directory:

   cd scientific-calculator

3. Compile the calculator:

   make

4. Run the calculator

   ./Calculator

Usage

1. Input mathematical expressions using the specified format.
2. Use the commands (config, sconfig, exit) to configure settings and control the calculator.
3. Explore various math functions and constants.

Configuration

The config command allows you to customize the calculator's configuration:

config

Example output:

Enter angle unit (D(deg)/R(rad)/G(gra)): R
Enter notation (N(Nrm)/S(Sci)): D
Enter float precision (integer): 4

Default Configuration

The calculator comes pre-configured with the following settings:

Angle Unit: RAD Notation: Sci (Scientific) Float Precision: 4

Show Configuration

The sconfig command displays the current configuration:

sconfig

Example output:

RAD, Sci, 4

Exit the Calculator

To exit the calculator, use the exit command:

exit

Context-Free Grammar (CFG)

The calculator's input expressions can be described by the following Context-Free Grammar:

E      → E + T | E - T | T
T      → T * F | T / F | F
F      → (-#) | (E) | Fct | Const | Cmd | #
Fct    → "cos()" | "sin()" | "tan()" | "exp()" | "log()" | "sqrt()"
Const  → "C" | "G" | "Me" | "Mp" | "Mn" | "E" | "Na" | "Vm" | "R" | "ANS" | "PI"
Cmd    → "exit" | "config" | "sconfig"
#      → {0,1,2,3,4,5,6,7,8,9}* . {0,1,2,3,4,5,6,7,8,9}*

Grammar Explanation:

• E: Represents the expression, which can be composed of addition, subtraction, or just a term.
• T: Represents a term, which can be composed of multiplication, division, or just a factor.
• F: Represents a factor, which can be a negation, a parenthesized expression, a function, a constant, a command, or an empty string.
• Fct: Represents the mathematical functions supported by the calculator.
• Const: Represents the constants recognized by the calculator.
• Cmd: Represents the commands recognized by the calculator.
• #: Represents a double numeric value.

Contributing

Contributions are welcome! If you have any suggestions, bug reports, or enhancements, feel free to contact me: achra.nosp@m.f.ba.nosp@m.diry@.nosp@m.edu..nosp@m.bme.h.nosp@m.u

License

This project is licensed under the GNU General Public License - see the LICENSE website for details.