该程序，通过以单个字符的形式逐个输入到文件1，然后把文件1的类容复制到文件2中，复

制时有些重要的细节需要注意:再往文件1输入时，最后一定也要输入一个换行符 \n ,复制时



也是如此；原因：复制时是以换行符结尾的，如果无换行符，那么会一直处于复制状态。当

然默认的是回车+换行符（ENTER+\n),

此时应以c==EOF为结束条件，而不是c== \n 。-The program, through the form of a single character input to file one by one, and then copy the contents of the file into a class file 2, copying some important details to note: Beyond an input file, the last must also enter a newline character ' \ n' , replication is also true　Cause: When copying a newline at the end, if no line breaks, so will always be in the replication status. Of course, the default is a carriage return+ newline (ENTER+ \ n), this time should be an end to c == EOF condition, rather than c == ' \ n' .