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Ningxia Hui Autonomous Region我……我就实话说了罢，我是田遥他母亲。Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.曾强与汪雨结婚十年，因没有房子一直和守寡的母亲住在一起。汪雨患严重妇科病不能过正常的夫妻生活，久而久之对丈夫的歉疚转为猜疑，甚至花钱雇人调查曾强。与此同时，汪雨十年前的恋人严峰却因当年的不负责任，至今对汪雨满怀愧疚。 　　故事就这样展开，期间两个男人与一个女人以及曾、严两个家庭间发生了太多的变故。曾强在经历了下岗、再就业、离婚等种种事情后，终于成就了一番大业；严峰却从一个腰缠万贯的富翁一步步走向衰落，最后在一次不法交易中成为牺牲品；而汪雨呢？复杂的个性使她在情感上飘忽不定，一次又一次的选择，却不知道是对还是错……杨寿全，吴凌珑皆是摇头。Because in her heart, she still firmly believes that marriage must be happy, and will still put trust in her feelings first like everyone else.The function prototype for the QDateTime:: toString () function is: