将数组写入txt读出后数据出错

最近使用fwrite将缓冲区的内容写入文件，发现写入的字节数与预期的不一致，后来发现是打开文件时fopen使用的mode是“w”，改为“wb”问题解决。 查看BCB的帮助文档发现: The mode string used in calls to fopen is one of the following values:  Value Description r Open for reading only. w Create for writing. If a file by that name already exists, it will be overwritten. a Append; open for writing at end-of-file or create for writing if the file does not exist. r+ Open an existing file for update (reading and writing). w+ Create a new file for update (reading and writing). If a file by that name already exists, it will be overwritten. a+ Open for append; open (or create if the file does not exist) for update at the end of the file.  To specify that a given file is being opened or created in text mode append a t to the mode string (rt, w+t, and so on). Similarly to specify binary mode append ab to the mode string (wb, a+b, and so on).fopen also allows the t or b to be inserted between the letter and the+ character in the mode string; for example rt+ is equivalent tor+t. If a t or b is not given in the mode string the mode is governed by the global variable_fmode. If _fmode is set to O_BINARY files are opened in binary mode. If_fmode is set to O_TEXT they are opened in text mode. TheseO_... constants are defined in fcntl.h. 原来BCB中fopen的“w”模式默认为“wt”，以文本方式打开文件。 二进制数据中难免有一些特殊字符，以文本方式打开后，fwrite每遇到一个0x0A就会在前面加一个0x0D，造成上面的问题。 Windows以“\r\n”为换行符