Student Work(Project)|CS101 Programming Project:Lex-Based Tiny Calculator in C/C++|MIT

Student | Client Work(Project)|CS101 Programming Project:Tiny Arithmetic Calculator using Unix (f)lex Tool Output Video | Massachusetts Institute of Technology

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🎓 University: Massachusetts Institute of Technology (MIT)
💻 Program: Bachelor of Science in Computer Science and Engineering
📚 Course: CS101 – Introduction to Programming and Software Development
📂 Project: Tiny Arithmetic Calculator using Unix (f)lex Tool

This project explores the fundamentals of lexical analysis and C/C++ programming by implementing a tiny calculator that supports:

➕ Addition
➖ Subtraction
✖️ Multiplication
➗ Division
🔺 Exponents

📌 Main Features:

Regular expression handling for numbers, operators, and identifiers
Lex integration using flex to tokenize arithmetic expressions
User-friendly CLI: Input expression → Press RETURN → Output result
Catches common input errors like invalid characters, missing operands, or incorrect syntax
Accepts integers, floating-point numbers, and scientific notation

📋 Sample Outputs:

2+3 → ✅ 2.00 + 3.00 = 5.00
3 * abc → ❌ abc - ERROR in the expression!!
123.0 * 12 → ✅ 1476.00
big_num/15 → ❌ Error detected on each token

🛠️ Tech Used:

C or C++
flex (lex tool)
Command-line interface
Compiler: gcc or g++

📢 This project showcases a hands-on intro to compilers, interpreters, and token scanning.
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