CFile Read and write files (solve Chinese characters, newline, empty character problems).

CStdioFile file;
if (!file. Open (_t ("D:\\file.txt"), Cfile::modereadwrite)
{
File. Open (_t ("D:\\file.txt"), cfile::modecreate| Cfile::modereadwrite);
}
CString str;
CTime Time=ctime::getcurrenttime ();
Str. Format (_t ("%d-%-d-%-d%d:%-d:%-d Record:"), time. GetYear (), time. GetMonth (), time. Getday (), time. Gethour (), time. Getminute (), time. Getsecond ());
The STR string ends with a str.getlenth, which means the last byte is not displayed but exists, and the last one is not.
WORD Num=widechartomultibyte (Cp_acp,null,str,-1,null,0,null,false);
Char *p=new Char[num];
memset (P,0,num);
WideCharToMultiByte (Cp_acp,null,str,-1,p,num,null,false);
File. Write (P,strlen (p));
File. Seektoend ();
File. Write ("\ n", 1);//a newline character \ n, the ASCI code used when writing, the newline in a byte; but when read, File.getlenth () interprets the newline as two bytes;
File. Seektoend ();
File. Write ("Good", strlen ("good"));
File. Close ();

if (!file. Open (_t ("D:\\file.txt"), Cfile::modereadwrite)
{
File. Open (_t ("D:\\file.txt"), cfile::modecreate| Cfile::modereadwrite);
}
Char *q;
Q=new Char[file. GetLength () +1];
memset (Q,0,file. GetLength () +1);
File. Read (Q,file. GetLength ()); the second parameter of//read stipulates that the carriage return line is a character, and when filling in the first parameter of read, fill in the byte of a char[] in a newline;
CString A (q);
Delete q;
MessageBox (a);
File. Close ();