Fixed up the hardcode audoio.mp3

.vscode/launch.json

@@ -6,6 +6,7 @@
             "type": "gdb",
             "preLaunchTask": "Build All",
             "request": "launch",
+            "arguments": "audio.mp3",
             "cobcargs": ["-free", "-x", "-g","-debug", "-Wall", "-O0"] ,
             "group": ["id3cobol.cbl"],
             "env": {

README.md

@@ -19,6 +19,7 @@ This project is a COBOL-based MP3 ID3 tag reader that parses and displays metada
 - `id3cobol.cbl`: Main COBOL program for reading and parsing MP3 ID3 tags.
 - `zero-ord.cbl`: COBOL module for zero-based ordinal conversion.
 - `Makefile`: Build automation file for compiling and cleaning the project.
+- `audio.mp3`: Sample MP3 file for testing (required for the program to run).
 - `.gitignore`: Specifies files and directories to be ignored by Git.
 
 ## Build Instructions
@@ -43,14 +44,52 @@ This project is a COBOL-based MP3 ID3 tag reader that parses and displays metada
    make distclean
    ```
 
+## Environment Variables
+
+The following environment variables are important for proper execution:
+
+- **COB_LIBRARY_PATH**: Tells COBOL where to find modules
+  ```bash
+  export COB_LIBRARY_PATH=/path/to/workspace:$COB_LIBRARY_PATH
+  ```
+
+- **COB_PRE_LOAD**: Tells COBOL to preload the zero-ord module
+  ```bash
+  export COB_PRE_LOAD=zero-ord
+  ```
+
+- **LD_LIBRARY_PATH**: Helps the Linux dynamic linker find the module
+  ```bash
+  export LD_LIBRARY_PATH=/path/to/workspace:$LD_LIBRARY_PATH
+  ```
+
+These variables are automatically set when using the VS Code debugger.
+
 ## Usage
 
-Run the compiled `id3cobol` program to parse the `audio.mp3` file:
+Run the compiled `id3cobol` program to parse an MP3 file:
+
 ```bash
+# Using default audio.mp3 file:
 ./id3cobol
+
+# Using a specific MP3 file:
+./id3cobol path/to/your/music.mp3
 ```
 
-> **Note**: Ensure you have an `audio.mp3` file in the same directory as the program. This file is required for the program to function.
+> **Note**: Ensure you have an MP3 file with ID3 tags. If no argument is provided, the program will look for `audio.mp3` in the current directory.
+
+## VS Code Integration
+
+This project includes VS Code configuration files:
+
+- **launch.json**: Configures debugging with proper environment variables
+- **tasks.json**: Defines build tasks for compiling the project
+
+To debug in VS Code:
+1. Press F5 or select "Run and Debug" from the left sidebar
+2. Select "COBOL debugger" configuration
+3. The debugger will automatically build and launch the program with audio.mp3
 
 ## Debugging
 

id3cobol.cbl

@@ -16,6 +16,7 @@ IDENTIFICATION DIVISION.
        *> Debug flag to enable/disable debug prints
        01 WS-DEBUG-MODE      PIC 9 VALUE 1.
 
+       *> Default filename that can be overridden with command-line argument
        01 WS-FILENAME        PIC X(255) VALUE "audio.mp3".
        01 WS-EOF-FLAG        PIC 9 VALUE 0.
        88 WS-EOF         VALUE 1.
@@ -24,6 +25,11 @@ IDENTIFICATION DIVISION.
        01 STOP-READING-FLAG  PIC 9 VALUE 0.
        88 STOP-READING       VALUE 1.
 
+       *> Command line argument handling
+       01 CMD-ARGS.
+          05 CMD-ARG-COUNT    PIC 9(2) COMP-5.
+          05 CMD-ARG-VALUES   PIC X(255) OCCURS 1 TO 10 DEPENDING ON CMD-ARG-COUNT.
+
        *> ID3v2 Header Structure
        01 ID3-HEADER.
            05 ID3-TAG         PIC X(3).      *> Should be "ID3"
@@ -82,6 +88,11 @@ IDENTIFICATION DIVISION.
        MAIN-PARA.
            DISPLAY "Starting MP3-ID3-INFO program".
            
+           *> Process command-line arguments
+           PERFORM PROCESS-COMMAND-LINE
+           
+           DISPLAY "Analyzing file: " FUNCTION TRIM(WS-FILENAME)
+
            PERFORM OPEN-FILE.
 
            IF WS-EOF-FLAG = 0
@@ -298,3 +309,19 @@ IDENTIFICATION DIVISION.
                END-READ
                MOVE WS-TEMP-BYTE TO BYTES-BUFFER(WS-I:1)
            END-PERFORM.
+
+       *> Process command-line arguments to get the filename
+       PROCESS-COMMAND-LINE.
+           *> Get argument count and values
+           ACCEPT CMD-ARG-COUNT FROM ARGUMENT-NUMBER
+           
+           *> Check if at least one argument was provided
+           IF CMD-ARG-COUNT > 0
+               *> Get the first argument (the filename)
+               ACCEPT CMD-ARG-VALUES(1) FROM ARGUMENT-VALUE
+               
+               *> If argument isn't empty, use it as filename
+               IF CMD-ARG-VALUES(1) NOT = SPACES
+                   MOVE CMD-ARG-VALUES(1) TO WS-FILENAME
+               END-IF
+           END-IF.