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本课程时间较长，内容多，同时在此时安排了如何进行竞赛中要求的in 和out文件的样例练习。
https://www.cnblogs.com/littlehb/p/11781056.html
D:\少儿编程\教案与课程\C++专题课程\文件输入与输出
区分二维输入和一维输入的方法，也练习一下输出文件。
