Examples have been added

Author: Levent KARAGÖL

examples/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.14)
+
+project(examples)
+
+add_executable(examples main.cpp)
+
+target_link_libraries(examples PRIVATE libcpp-event-hub)

examples/main.cpp

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+#include "libcpp-event-hub.hpp"
+#include <string>
+#include <iostream>
+
+using namespace lklibs;
+
+int main()
+{
+    // Get the singleton instance of the EventHub
+    auto& eventHub = EventHub::getInstance();
+
+    // Add a listener for testEvent1, which sends a string value
+    auto listener1Id = eventHub.addListener<std::string>("testEvent1", [](const std::string& eventName, const std::string& sender, const std::string& data)
+    {
+        std::cout << "1. listener received, Event name: " << eventName << ", sender: " << sender << ", data: " << data << std::endl;
+    });
+
+    // Add a listener for testEvent2, which sends an int value
+    auto listener2Id = eventHub.addListener<int>("testEvent2", [](const std::string& eventName, const std::string& sender, const int& data)
+    {
+        std::cout << "2 listener received, Event name: " << eventName << ", sender: " << sender << ", data: " << data << std::endl;
+    });
+
+    // Add a general listener for all events with a string value
+    auto listener3Id = eventHub.addListener<std::string>("*", [](const std::string& eventName, const std::string& sender, const std::string& data)
+    {
+        std::cout << "General listener received: " << eventName << ", sender: " << sender << ", data: " << data << std::endl;
+    });
+
+    // Emit testEvent1 with a string value, 2 listeners will receive the event (listener1 and the general listener)
+    eventHub.emit("testEvent1", "main", std::string("Value 1"));
+
+    // Emit testEvent2 with an int value, 1 listeners will receive the event (listener2), because there is no general listener for int values
+    eventHub.emit("testEvent2", "main", 7);
+
+    // Remove the first listener for testEvent1
+    eventHub.removeListener("testEvent1", listener1Id);
+
+    // Emit testEvent1 again, only the general listener will receive the event
+    eventHub.emit("testEvent1", "main", std::string("Value 2"));
+
+    return 0;
+}