编辑“︁C++ 单例模式实现”︁（章节）

== 实际应用案例 ==
=== 配置管理器 ===
游戏开发中常用单例管理全局配置：

<syntaxhighlight lang="cpp">
class ConfigManager {
private:
    std::unordered_map<std::string, std::string> settings;
    static ConfigManager* instance;
    
    ConfigManager() {
        // 加载配置文件
        settings["resolution"] = "1920x1080";
        settings["volume"] = "80";
    }
    
public:
    static ConfigManager& getInstance() {
        static ConfigManager instance;
        return instance;
    }
    
    std::string getSetting(const std::string& key) {
        return settings[key];
    }
    
    void setSetting(const std::string& key, const std::string& value) {
        settings[key] = value;
    }
};
</syntaxhighlight>

=== 日志系统 ===
<syntaxhighlight lang="cpp">
class Logger {
private:
    std::ofstream logFile;
    static Logger* instance;
    
    Logger() {
        logFile.open("app.log", std::ios::app);
    }
    
public:
    static Logger& getInstance() {
        static Logger instance;
        return instance;
    }
    
    void log(const std::string& message) {
        logFile << "[" << getCurrentTime() << "] " << message << std::endl;
    }
    
    ~Logger() {
        logFile.close();
    }
};
</syntaxhighlight>