ANSI 和 UNICODE 的函数对应表

ANSI UNICODE 通用
(char.h) (wchar.h) (tchar.h)

char wchar_t TCHAR
char * wchar_t * PTCHAR (PTSTR,LPWSTR,PWSTR,WCHAR)

printf wprintf _tprintf
scanf wscanf _tscanf

atoi _wtoi _ttoi
atol _wtol _ttol
itoa _itow _itot
ltoa _ltow _ltot

atof _wtof _tstof

strlen wcslen _tcslen
strcat wcscat _tcscat
strcpy wcscpy _tcscpy
strcmp wcscmp _tcscmp