Codes/CRC.cpp

@@ -43,35 +43,6 @@ string encoder(string data, string key) {
     return data + crc;
 }
 
-string performDivision(string data, string key) {
-    int keyLen = key.length();
-
-    // Initialize with the data to be divided
-    string temp = data.substr(0, keyLen);
-
-    // Perform XOR operations on each segment
-    for (int i = keyLen; i < data.length(); i++) {
-        if (temp[0] == '1') {  // Only perform XOR if the leading bit is 1
-            temp = XOR(temp, key);
-        }
-        temp = temp.substr(1) + data[i];  // Shift left and add the next bit
-    }
-
-    // Perform the final XOR operation
-    if (temp[0] == '1') {
-        temp = XOR(temp, key);
-    }
-
-    // Extract the remainder (last keyLen-1 bits)
-    return temp.substr(temp.length() - (keyLen - 1));
-}
-
-// Function to check the correctness of received data
-bool checkData(string data, string key) {
-    string remainder = performDivision(data, key);
-    return (remainder.find('1') == string::npos); // No '1' means remainder is all zeros
-}
-
 int main() {
     string data, key;
 
@@ -80,23 +51,13 @@ int main() {
     cout << "Enter primary key:\t";
     getline(cin, key);
 
-    cout<<endl<<"Original data:\t"<<data;
-    cout<<endl<<"Key:\t"<<key;
     string messageToSend = encoder(data, key);
-    cout<<endl<<"----------------------------------------"<<endl;
+    cout<<endl<<"--------------------"<<endl;
     cout<<"Message to be sent:\t"<<messageToSend;
-    cout<<endl<<"----------------------------------------"<<endl;
+    cout<<endl<<"--------------------"<<endl;
-
-    string receivedData;
-    cout<<endl<<"HINT: Received data should be the same as message to be sent.";
-    cout<<endl<<"Enter received data:\t";
-    getline(cin, receivedData);
-
-    if (receivedData == messageToSend) {
-        cout<<"The received data is correct."<<endl;
-    } else {
-        cout<<"The received data appears to be tampered."<<endl;
-    }
 
     return 0;
 }
+
+// TODO:
+// - Check if input data is actually binary

Codes/sliding-window.cpp

@@ -1,79 +0,0 @@
-#include <iostream>
-#include <vector>
-#include <queue>
-
-using namespace std;
-
-class SlidingWindow {
-private:
-    int window_size;
-    int total_frames;
-    vector<int> sent_frames; // queue of sent frames
-    int next_frame_to_send; // index of the next frame to send
-    int next_frame_to_receive; // index of the next frame to receive
-
-public:
-  SlidingWindow(int window_size, int total_frames) {
-    this->window_size = window_size;
-    this->total_frames = total_frames;
-    this->next_frame_to_send = 0;
-    this->next_frame_to_receive = 0;
-  }
-
-    // send a frame
-    void send_frame() {
-        if (sent_frames.size() < window_size && next_frame_to_send < total_frames) {
-            sent_frames.push_back(next_frame_to_send);
-            next_frame_to_send++;
-            cout << "Sent frame " << sent_frames.back() << endl;
-        } else {
-            cout << "Window is full. Waiting before sending next frames." << endl;
-        }
-    }
-
-    // receive a frame
-    void receive_frame(int frame_number) {
-        if (frame_number == next_frame_to_receive) {
-            next_frame_to_receive++;
-            cout << "Received frame " << frame_number << endl;
-        } else {
-            cout << "Received frame " << frame_number << ", but expected frame " << next_frame_to_receive << endl;
-        }
-
-        // remove acknowledged frames from the sent_frames queue
-        while (!sent_frames.empty() && sent_frames.front() <= next_frame_to_receive - 1) {
-            sent_frames.erase(sent_frames.begin());
-        }
-    }
-
-    bool all_frames_sent() {
-        return next_frame_to_send == total_frames;
-    }
-
-    bool all_frames_received() {
-        return next_frame_to_receive == total_frames;
-    }
-};
-
-int main() {
-    int window_size, total_frames;
-    cout << "Enter the window size:\t";
-    cin >> window_size;
-    cout << "Enter the total number of frames:\t";
-    cin >> total_frames;
-
-    SlidingWindow window(window_size, total_frames);
-
-    while (!window.all_frames_sent() || !window.all_frames_received()) {
-        window.send_frame();
-
-        // simulate receiving frames
-        for (int i = 0; i < rand() % 3; i++) {
-            int frame_number = rand() % total_frames;
-            window.receive_frame(frame_number);
-        }
-    }
-    cout << "All frames sent and received successfully!" << endl;
-
-    return 0;
-}