关于multiple definition of 错误说明很详细的文章【转载】

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       https://blog.csdn.net/xxxxxx91116/article/details/7446455?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param