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sudiptoown01.c

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Property Detail
Difficulty Beginner (index: 2 / 10)

Concepts

Beta Feature

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  • Pointers
  • Recursion
  • Array

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Source Code

#include <stdio.h>

int casekey(int door, int window, int motion, int glass) {
    int key = (door << 3) | (window << 2) | (motion << 1) | glass;
    return key;
}

int main() {
    int door, window, motion, glass, key;
    char choice;

    static const char *action[16] = {
        "IDLE", "CHECK WINDOW", "WARN MOTION", "WARN MOTION WINDOW",
        "CHECK DOOR", "WARN DOOR WINDOW", "INTRUSION SUSPECTED", "INTRUSION CONFIRMED",
        "GLASS ONLY", "DOOR GLASS", "MOTION GLASS", "MOTION WINDOW GLASS",
        "DOOR WINDOW", "DOOR WINDOW GLASS", "DOOR MOTION GLASS", "ALL SENSORS"
    };

    do {
        printf("Sensors: Door, Window, Motion, Glass\n");
        printf("Enter the state of each sensor in binary (0 or 1): ");
        scanf("%d %d %d %d", &door, &window, &motion, &glass);

        key = casekey(door, window, motion, glass);
        printf("Action: %s\n", action[key]);

        printf("Want to continue? (y/n): ");
        scanf(" %c", &choice);
        printf("\n");
    } while (choice == 'y' || choice == 'Y');

    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 (sudiptoown01.c):

    #include <stdio.h>

    int casekey(int door, int window, int motion, int glass) {
        int key = (door << 3) | (window << 2) | (motion << 1) | glass;
        return key;
    }

    int main() {
        int door, window, motion, glass, key;
        char choice;

        static const char *action[16] = {
            "IDLE", "CHECK WINDOW", "WARN MOTION", "WARN MOTION WINDOW",
            "CHECK DOOR", "WARN DOOR WINDOW", "INTRUSION SUSPECTED", "INTRUSION CONFIRMED",
            "GLASS ONLY", "DOOR GLASS", "MOTION GLASS", "MOTION WINDOW GLASS",
            "DOOR WINDOW", "DOOR WINDOW GLASS", "DOOR MOTION GLASS", "ALL SENSORS"
        };

        do {
            printf("Sensors: Door, Window, Motion, Glass\n");
            printf("Enter the state of each sensor in binary (0 or 1): ");
            scanf("%d %d %d %d", &door, &window, &motion, &glass);

            key = casekey(door, window, motion, glass);
            printf("Action: %s\n", action[key]);

            printf("Want to continue? (y/n): ");
            scanf(" %c", &choice);
            printf("\n");
        } while (choice == 'y' || choice == 'Y');

        return 0;
    }