CFile savefile;
char* cr="\r\n"; <-----這邊再加入一ㄍ \r   一定要\r在前!!
savefile.Open("c:\\test.txt",CFile::modeCreate | CFile::modeWrite);
savefile.Write("aerfasdf",strlen("aerfasdf"));
savefile.Write(cr,1);
savefile.Write("aerfasdf",strlen("aerfasdf"));
savefile.Close();