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A full-stack web application that allows users to define aDeterministic Finite State Machine (DFA), simulate input strings against it, and generate avisual PDF representation of the DFA. Built usingAngular andFastAPI, with DFA logic powered byautomata-lib and Graphviz.

• Define DFA (states, alphabet, transitions, start/accept states)
• Input a string and check if it's accepted
• Visualize the DFA structure as a downloadable PDF
• Practical tool for automata theory

1. Frontend: Angular 17+
2. Backend: FastAPI (Python 3.10+)
3. DFA logic: automata-lib v1.0.0
4. Visualization: graphviz

1. Navigate to backend:

   • cd backend

2. Create and activate virtual environment:

   • python -m venv venv
   • source venv/bin/activate # On Windows: venv\Scripts\activate

3. Install dependencies:

   • pip install -r requirements.txt

4. Install Graphviz (Required for PDF output):

   • Linux/macOS:
     • sudo apt install graphviz
   • Windows:
     • Download fromhttps://graphviz.org/download/

5. Run the FastAPI server:

   • uvicorn main:app --reload

1. Navigate to frontend folder:

   • cd Angular_frontend

2. Install dependencies:

   • npm install

3. Run the frontend app:

   • ng serve

Visit:http://localhost:4200

• Backend (requirements.txt):

1. fastapi==0.111.0
2. uvicorn==0.30.1
3. automata-lib
4. graphviz==0.20.3
5. pydantic==2.7.1

• Frontend (Angular v17+):

1. Angular CLI v17
2. RxJS v7+
3. TypeScript v5+

States: q0,q1,q2

Alphabet: 0,1

Start State: q0

Accept States: q2

Input String: 010

Transitions:

1. q0,0,q1
2. q0,1,q0
3. q1,0,q1
4. q1,1,q2
5. q2,0,q2
6. q2,1,q2(remove the number bullets and paste )

String verdict: Accepted ✅ or Rejected ❌

DFA PDF: Downloadable file from /pdf/dfa_output.pdf

Mohammed Basith📫 LinkedIn:www.linkedin.com/in/mohammed-basith-97326321b