commit 0228ec68d33ae3c181955fc381e440f304c5bb41
parent 820f15921c6b1ee4fb5ec13fbea6af6f23fccf5c
Author: Amit Dutta <amitdutta4255@gmail.com>
Date: Sun, 12 Oct 2025 19:52:22 +0530
update _index
Diffstat:
| M | docs/index.html | | | 189 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 189 insertions(+), 0 deletions(-)
diff --git a/docs/index.html b/docs/index.html
@@ -395,6 +395,195 @@ int main() {
</li>
<li class="border rounded-lg overflow-hidden">
+ <div class="folder-header bg-gray-100 p-4 cursor-pointer hover:bg-blue-100 transition-colors duration-200" onclick="toggleFolder('challange')">
+ <div class="flex items-center justify-between">
+ <div class="flex items-center">
+ <svg class="w-6 h-6 text-blue-500 mr-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z"></path></svg>
+ <span class="font-medium text-gray-800">challange</span>
+ <span class="ml-2 text-sm text-gray-500">(1 files)</span>
+ </div>
+ <div class="flex items-center space-x-4">
+ <a href="https://github.com/notamitgamer/bsc/tree/main/challange" target="_blank" class="p-1 rounded-full text-gray-500 hover:bg-gray-200 hover:text-gray-800 transition-colors" onclick="event.stopPropagation()" title="View folder on GitHub">
+ <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path fill-rule="evenodd" d="M12 2C6.477 2 2 6.477 2 12c0 4.418 2.865 8.168 6.839 9.492.5.092.682-.217.682-.482 0-.237-.009-.868-.014-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.031-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.203 2.398.1 2.651.64.7 1.03 1.595 1.03 2.688 0 3.848-2.338 4.695-4.566 4.942.359.308.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.001 10.001 0 0022 12c0-5.523-4.477-10-10-10z" clip-rule="evenodd"></path></svg>
+ </a>
+ <div class="chevron" id="chevron-challange"><svg class="w-5 h-5 text-gray-500 transition-transform duration-200" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path></svg></div>
+ </div>
+ </div>
+ </div>
+ <div class="folder-content hidden bg-white" id="folder-challange">
+ <ul class="divide-y divide-gray-200">
+
+ <li>
+ <div class="flex items-center p-3 pl-8 hover:bg-gray-50 transition-colors duration-200">
+ <svg class="w-6 h-6 text-green-500 mr-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z"></path></svg>
+ <span class="text-gray-700">sudipto1.c</span>
+ <div class="ml-auto flex items-center space-x-4">
+ <a href="https://github.com/notamitgamer/bsc/blob/main/challange/sudipto1.c" target="_blank" class="p-1 rounded-full text-gray-500 hover:bg-gray-200 hover:text-gray-800 transition-colors" title="View file on GitHub">
+ <svg class="w-6 h-6" fill="currentColor" viewBox="0 0 24 24" aria-hidden="true"><path fill-rule="evenodd" d="M12 2C6.477 2 2 6.477 2 12c0 4.418 2.865 8.168 6.839 9.492.5.092.682-.217.682-.482 0-.237-.009-.868-.014-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.031-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.203 2.398.1 2.651.64.7 1.03 1.595 1.03 2.688 0 3.848-2.338 4.695-4.566 4.942.359.308.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.001 10.001 0 0022 12c0-5.523-4.477-10-10-10z" clip-rule="evenodd"></path></svg>
+ </a>
+ <button onclick="showCode('code-challange-sudipto1_c', 'sudipto1.c')" class="text-green-600 font-semibold text-sm hover:underline">View Code</button>
+ </div>
+ </div>
+ <div id="code-challange-sudipto1_c" class="hidden" data-github-url="https://github.com/notamitgamer/bsc/blob/main/challange/sudipto1.c">
+ <pre><code class="language-c">/* A smart home security controller monitors the state of several sensors to decide what action to take.
+ * Each second, the system reads data from sensors that can either be active or inactive. Based on the current
+ * state of all sensors, the controller must perform exactly one action, such as activating a warning, checking
+ * a specific zone, or declaring an intrusion. Write a C program that reads the sensor states as input and
+ * prints the corresponding system action.
+ -- Conditions:
+ * 1. You must determine exactly one action for every possible combination of sensor states.
+ * 2. You are not allowed to use any conditional statements (if, else if, else, or the ternary operator?).
+ * 3. You are not allowed to use logical operators.
+ * 4. You must use a single switch statement to control the program's behaviour.
+ * 5. Loops may only be used for reading input, not for making decisions.
+ * 6. The program should handle all possible combinations of the sensors' active/inactive states and print the appropriate response each time.
+ -- Example (for understanding):
+ * If all sensors are inactive, the system should remain idle.
+ * If some sensors are active, the system should issue warnings or alerts based on the situation.
+ * If all sensors are active, the system should declare a confirmed intrusion.
+ */
+
+/*
+ * This program monitors the state of four sensors (Door, Window, Motion, Glass Break)
+ * and determines the appropriate action without using any conditional (if, else)
+ * or logical (&&, ||) operators.
+ *
+ * It works by combining the state of all sensors into a single integer value
+ * using bitmasking. Each bit in the integer represents the state of one sensor
+ * (1 for active, 0 for inactive). This combined state is then used in a single
+ * switch statement to select the correct action for every possible combination.
+ *
+ * Then, enter the state of the four sensors separated by spaces,
+ * for example: 1 0 1 0
+ */
+
+/* Author - Amit Dutta, Date - 12th October, 2025 */
+
+#include <stdio.h>
+int main()
+{
+
+ // variables to hold the state of a sensor (0 or 1)
+ int doorSensorState, windowSensorState, motionSensorState, glassbreakSensorState;
+
+ // variable to check the combined state of all four sensor
+ int combinedState = 0;
+
+ // a invalid flag to check the input are valid or not
+ unsigned int invalidFlag;
+
+ // printing the way to usage the program
+ printf("------ Home Security Controller ------\n");
+ printf("Enter sensor states (1 for active, 0 for inactive).\n");
+ printf("Format: [Door] [Window] [Motion] [Glass Break]\n");
+ printf("Example: 0 1 1 0\n");
+ printf("Enter states (or press Ctrl+D for MacOS or Linux / Ctrl+Z for Windows to exit): ");
+
+ // doing the main calculation
+ // chacking the combined state and taking a decision
+ while (scanf("%d %d %d %d", &doorSensorState, &windowSensorState, &motionSensorState, &glassbreakSensorState) == 4)
+ {
+ // validating input
+ // The expression (variable & ~1) results in 0 only if 'variable' is 0 or 1.
+ // For any other positive number, it's non-zero.
+ // We combine all checks with a bitwise OR. If any sensor state is invalid,
+ // the flag will become non-zero.
+ invalidFlag = (doorSensorState & ~1) | (windowSensorState & ~1) | (motionSensorState & ~1) | (glassbreakSensorState & ~1);
+
+ // Combine the four sensor states into a single integer using bitwise operations.
+ // This creates a unique number from 0 to 15 for each possible combination.
+ // Bit 0: Door Sensor
+ // Bit 1: Window Sensor
+ // Bit 2: Motion Sensor
+ // Bit 3: Glass Break Sensor
+ combinedState = (glassbreakSensorState << 3) | (motionSensorState << 2) | (windowSensorState << 1) | doorSensorState;
+
+ // If the invalid_input_flag is non-zero, we add 16 to the state.
+ // This pushes it outside the 0-15 range and forces the 'default' case in the switch.
+ // We achieve this by multiplying the flag (which is > 0) by 16.
+ combinedState += invalidFlag * 16;
+
+ // printing the given state
+ printf("\n\nState : [Door : %d, Window : %d, Motion : %d, Glass Break : %d]\nState Id : %d",
+ doorSensorState, windowSensorState, motionSensorState, glassbreakSensorState, combinedState);
+ printf("\nSystem Action : ");
+
+ // taking decision based on combined state
+ // A single switch statement controls the program's behavior.
+ // It handles all 2^4 = 16 possible combinations of sensor states,
+ // ensuring exactly one action is taken for every scenario.
+ switch (combinedState)
+ {
+ case 0: // Binary: 0000
+ printf("System Idle. All sensors inactive.\n");
+ break;
+ case 1: // Binary: 0001
+ printf("Check front door camera.\n");
+ break;
+ case 2: // Binary: 0010
+ printf("Check window sensors.\n");
+ break;
+ case 3: // Binary: 0011
+ printf("Warning: Perimeter breach suspected. Check doors and windows.\n");
+ break;
+ case 4: // Binary: 0100
+ printf("Check interior cameras for movement.\n");
+ break;
+ case 5: // Binary: 0101
+ printf("Warning: Potential entry and movement detected. Check front door and interior. Ask for patrol.\n");
+ break;
+ case 6: // Binary: 0110
+ printf("Warning: Potential entry and movement detected. Check windows and interior. Ask for patrol.\n");
+ break;
+ case 7: // Binary: 0111
+ printf("Alert: High probability of unauthorized entry. Ask for patrol.\n");
+ break;
+ case 8: // Binary: 1000
+ printf("Alert: Glass break detected. High-priority event. Ask for patrol.\n");
+ break;
+ case 9: // Binary: 1001
+ printf("Severe Alert: Forced entry likely (door + glass). Activate Alarm and Contact authorities.\n");
+ break;
+ case 10: // Binary: 1010
+ printf("Severe Alert: Forced entry likely (window + glass). Activate Alarm and Contact authorities.\n");
+ break;
+ case 11: // Binary: 1011
+ printf("Intrusion Alert: Multiple perimeter breaches. Activate Alarm and Contact authorities.\n");
+ break;
+ case 12: // Binary: 1100
+ printf("Intrusion Alert: Confirmed interior presence after breach. Activate Alarm and Contact authorities.\n");
+ break;
+ case 13: // Binary: 1101
+ printf("INTRUSION CONFIRMED! Activate maximum response protocol. Activate Alarm and Contact authorities.\n");
+ break;
+ case 14: // Binary: 1110
+ printf("INTRUSION CONFIRMED! Activate maximum response protocol. Activate Alarm and Contact authorities.\n");
+ break;
+ case 15: // Binary: 1111
+ printf("CATASTROPHIC EVENT! ALL SENSORS TRIGGERED. ACTIVATE ALARM AND CONTACT COPS.\n");
+ break;
+ default:
+ // This case should not be reached with valid 0/1 input but is included for completeness.
+ printf("Error: Invalid sensor state detected.\n");
+ break;
+ }
+
+ // discarding extra characters (if any)
+ while (getchar() != '\n')
+ ;
+
+ // asking for next set of input
+ printf("\nEnter next set of states: ");
+ }
+ printf("\nSecurity system shutting down.\n");
+}</code></pre>
+ </div>
+ </li>
+ </ul>
+ </div>
+ </li>
+
+ <li class="border rounded-lg overflow-hidden">
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