`assignment-p-12_v1.c`¶

Problem Statement

Write a C program that takes multiple integers as command-line arguments and finds the maximum and minimum value among them.

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)

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Source Code¶

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

// use atoi()

int main(int argc, char *argv[])
{
    int current_val, max_val, min_val, i;
    char *endptr;
    long first_arg_val;
    if (argc < 2)
    {
        printf("Usage: %s <integer1> <integer2> ...\n", argv[0]);
        return 1;
    }
    first_arg_val = strtol(argv[1], &endptr, 10);
    if (*endptr != '\0' || argv[1] == endptr)
    {
        printf("Error: Argument '%s' is not a valid integer.\n", argv[1]);
        return 1;
    }
    max_val = (int)first_arg_val;
    min_val = (int)first_arg_val;
    for (i = 2; i < argc; i++)
    {
        long val = strtol(argv[i], &endptr, 10);
        if (*endptr != '\0' || argv[i] == endptr)
        {
            printf("Error: Argument '%s' is not a valid integer.\n", argv[i]);
            return 1;
        }
        current_val = (int)val;
        if (current_val > max_val)
        {
            max_val = current_val;
        }
        if (current_val < min_val)
        {
            min_val = current_val;
        }
    }
    printf("The maximum value is: %d\n", max_val);
    printf("The minimum value is: %d\n", min_val);
    return 0;
}

Explanation¶

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    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-12_v1.c):

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

    // use atoi()

    int main(int argc, char *argv[])
    {
        int current_val, max_val, min_val, i;
        char *endptr;
        long first_arg_val;
        if (argc < 2)
        {
            printf("Usage: %s <integer1> <integer2> ...\n", argv[0]);
            return 1;
        }
        first_arg_val = strtol(argv[1], &endptr, 10);
        if (*endptr != '\0' || argv[1] == endptr)
        {
            printf("Error: Argument '%s' is not a valid integer.\n", argv[1]);
            return 1;
        }
        max_val = (int)first_arg_val;
        min_val = (int)first_arg_val;
        for (i = 2; i < argc; i++)
        {
            long val = strtol(argv[i], &endptr, 10);
            if (*endptr != '\0' || argv[i] == endptr)
            {
                printf("Error: Argument '%s' is not a valid integer.\n", argv[i]);
                return 1;
            }
            current_val = (int)val;
            if (current_val > max_val)
            {
                max_val = current_val;
            }
            if (current_val < min_val)
            {
                min_val = current_val;
            }
        }
        printf("The maximum value is: %d\n", max_val);
        printf("The minimum value is: %d\n", min_val);
        return 0;
    }

assignment-p-12_v1.c¶