class Printer {
public:
        static Printer& getInstance();
        static int integerA;
        static int integerB;
        ......
private:
        ....

}

class Printer1 {
public:
        static string stringA;
        static string stringB;
}

此五個static function or variable初始化時間點不一定!

這是C++存在的問題!