UPDATE:

1. basic usage of `qubit` class

Author: Dark-CodeX

qubitverse/simulator/simulator/simulator.cc

@@ -3,27 +3,40 @@
  * @license This file is licensed under the GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007. You may obtain a copy of this license at https://www.gnu.org/licenses/gpl-3.0.en.html.
  * @author Tushar Chaurasia (Dark-CodeX)
  */
+
 #include "../gates/gates.hh"
 #include <iostream>
 
-int main() {
+int main()
+{
     using namespace simulator;
-
-    // Instantiate a 3-qubit system
-    qubit<100> q;
-
+    qubit<3> q;
     std::cout << "Initial state (3-qubit system):\n";
     const auto &init_state = q.get_qubits();
-    for (std::size_t i = 0; i < q.get_size(); ++i) {
+    for (std::size_t i = 0; i < q.get_size(); ++i)
+    {
         std::cout << "State[" << i << "] = " << init_state[i] << "\n";
     }
 
-    q.apply_pauli_x(1);
-    std::cout << "\n\nAFTER\n";
+    q.apply_hadamard(0);
+    q.apply_pauli_y(1);
+
+    std::cout << "\nState after applying Hadamard on qubit 0 and Pauli-Y on qubit 1:\n";
+    const auto &state_after_gates = q.get_qubits();
+    for (std::size_t i = 0; i < q.get_size(); ++i)
+    {
+        std::cout << "State[" << i << "] = " << state_after_gates[i] << "\n";
+    }
+
+    std::cout << "\nMeasuring the entire system...\n";
+    std::size_t outcome = q.measure();
+    std::cout << "Measurement outcome: " << outcome << "\n";
 
-    const auto &final_state = q.get_qubits();
-    for (std::size_t i = 0; i < q.get_size(); ++i) {
-        std::cout << "State[" << i << "] = " << final_state[i] << "\n";
+    std::cout << "\nState after measurement (collapsed state):\n";
+    const auto &state_after_measure = q.get_qubits();
+    for (std::size_t i = 0; i < q.get_size(); ++i)
+    {
+        std::cout << "State[" << i << "] = " << state_after_measure[i] << "\n";
     }
 
     return 0;