ASCII Table Generator in C

This project demonstrates low-level file I/O in C using system calls like open, read, write, and close. The program writes the ASCII codes for values 32–126 to a file, then reads them back, printing both the numeric values and their corresponding characters.

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📂 Features

• Generates a file containing ASCII codes (32–126).

• Reads integers from the file and outputs:

  • The numeric ASCII code
  • The corresponding ASCII character

• Implements file operations using system calls instead of standard library functions.

• Includes error handling for file operations.

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🛠️ Technologies Used

• C Programming Language
• POSIX System Calls (open, write, read, close)
• Linux/Unix environment

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🚀 How to Compile and Run

1. Clone this repository:

   git clone https://github.com/yourusername/ascii-table-generator.git
   cd ascii-table-generator

2. Compile the program:

   gcc c-ascii.c -o prog

3. Run the program with a filename as argument:

   ./prog DATA.txt

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📊 Example Output

32  
33 !  
34 "  
35 #  
36 $  
...  
125 }  
126 ~  

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📖 Learning Objectives

This project reinforces:

• Working with low-level file I/O.
• Converting between numeric values and characters.
• Parsing integers manually from text data.
• Error handling in C.

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📝 Future Improvements

• Allow users to specify custom ASCII ranges via command-line arguments.
• Support multiple output formats (decimal, hex, char).
• Option to write results to both file and terminal.

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👤 Author

• David Salas C. Computer Science Student | Passionate about Systems Programming & Software Development