`assignment-p-14_v1.c`¶

Problem Statement

Write a C program that opens its own source code file, reads its contents, and then prints the contents to the console.

Metadata¶

Property	Detail
Author	Amit Dutta amitdutta4255@gmail.com
Date	12 Dec 2025
License	MIT License (See the LICENSE file for details)
Difficulty	Beginner (index: 2 / 10)

Concepts¶

Beta Feature

This concept detection system is still in beta and may occasionally show incorrect or incomplete results.

Recursion
Array
Pointers
Iteration

Actions¶

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Source Code¶

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    FILE *code;
    int character, len_upto_dot;
    char *FILENAME;
    char *dot;

    FILENAME = strdup(argv[0]);

    if (FILENAME == NULL)
    {
        printf("\nMemory allocation failed.\n");
        return 1;
    }

    dot = strrchr(FILENAME, '.');

    if (dot != NULL)
    {
        len_upto_dot = dot - FILENAME;
        FILENAME[len_upto_dot] = '\0';
    }

    strcat(FILENAME, ".c");

    code = fopen(FILENAME, "r");

    if (code == NULL)
    {
        printf("\nCould not open the source file: %s", FILENAME);
        printf("\nPlease ensure the source file is in the same directory as the executable.\n");
        free(FILENAME);
        return 1;
    }

    printf("\nReading file: %s", FILENAME);
    printf("\n========== %s ==========\n\n", FILENAME);

    while ((character = fgetc(code)) != EOF)
    {
        putchar(character);
    }

    printf("\n\n========== End of %s ==========\n", FILENAME);

    fclose(code);
    free(FILENAME);

    return 0;
}

Explanation¶

Explain with AI

Copy the prompt below and paste it into any AI assistant.

    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

    - Follow the exact format below. Do NOT change headings.

    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (assignment-p-14_v1.c):

    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>

    int main(int argc, char *argv[])
    {
        FILE *code;
        int character, len_upto_dot;
        char *FILENAME;
        char *dot;

        FILENAME = strdup(argv[0]);

        if (FILENAME == NULL)
        {
            printf("\nMemory allocation failed.\n");
            return 1;
        }

        dot = strrchr(FILENAME, '.');

        if (dot != NULL)
        {
            len_upto_dot = dot - FILENAME;
            FILENAME[len_upto_dot] = '\0';
        }

        strcat(FILENAME, ".c");

        code = fopen(FILENAME, "r");

        if (code == NULL)
        {
            printf("\nCould not open the source file: %s", FILENAME);
            printf("\nPlease ensure the source file is in the same directory as the executable.\n");
            free(FILENAME);
            return 1;
        }

        printf("\nReading file: %s", FILENAME);
        printf("\n========== %s ==========\n\n", FILENAME);

        while ((character = fgetc(code)) != EOF)
        {
            putchar(character);
        }

        printf("\n\n========== End of %s ==========\n", FILENAME);

        fclose(code);
        free(FILENAME);

        return 0;
    }

assignment-p-14_v1.c¶