Calculator

A simple command-line calculator program written in C that supports basic arithmetic operations.

Features

• Supports basic arithmetic operations: addition (+), subtraction (-), multiplication (*), and division (/)
• Handles operator precedence (multiplication and division are evaluated before addition and subtraction)
• Supports floating-point numbers
• Interactive input mode
• Displays results with 2 decimal places

Usage

1. Compile the program:

gcc cal.c -o calculator

2. Run the program:

./calculator

3. Enter your calculation:

• Type numbers and operators in sequence
• End your calculation with '=' to see the result
• Example: 2 + 3 * 4 = will output 14.00

Examples

• 2 + 3 = → 5.00
• 10 - 4 * 2 = → 2.00
• 6 / 2 + 3 = → 6.00

Notes

• The calculator follows standard operator precedence rules
• Division by zero will result in undefined behavior
• Input should be entered one number/operator at a time
• The program will continue accepting input until '=' is entered