VC 中数字与字符串转换方法（转载）

字符串转数字

1．CRT函数 

 

	ASCII	UNICODE	TCHAR	VS2005
int	atoi	_wtoi	_tstoi  _ttoi	_atoi_l _wtoi_l
long	atol	_wtol	_tstoi _ttoi	_atoi_l _wtoi_l
__int64	_atoi64	_wtoi64	_tstoi64 _ttoi64	_atoi64_l _wtoi64_l
float				_atoflt _atoflt_l
double	atof	_wtof	_tstof _ttof	_atof_l _wtof_l _atodbl _atodbl_l
long double				_atoldbl _atoldbl_l

2.使用sscanf

3.Windows SDK：

<shlwapi.h>：StrToInt

4.MFC/ATL：

     CString::Format （此函数应该是用来将数字转成字符，MSDN中有解释）

数字转字符串

1.CRT函数

 

	ASCII	UNICODE	TCHAR	VS2005
int	itoa _itoa	_itow	_itot
long	ltoa _ltoa	_ltow	_ltot
__int64	_i64toa	_i64tow	_i64tot
double	gcvt _gcvt _ecvt _fcvt	_wtof	_tstof _ttof	_gcvt_s _ecvt_s _fcvt_s

2.使用sprintf

3.<strsafe.h>：StringCbPrintf

 

通用相互转换方法

1.C++流方式：

stringstream 

2.boost库：

boost:: lexical_cast

 

 

摘自MSDN：

Data-Conversion Routines

Routine	Use
atof, _atof_l, _wtof, _wtof_l	Convert string to float
atoi, _atoi_l, _wtoi, _wtoi_l	Convert string to int
_atoi64, _atoi64_l, _wtoi64, _wtoi64_l	Convert string to __int64
atol, _atol_l, _wtol, _wtol_l	Convert string to long
_ecvt, _ecvt_s	Convert double to string of specified length
_fcvt, _fcvt_s	Convert double to string with specified number of digits following decimal point
_gcvt, _gcvt_s	Convert double number to string; store string in buffer
_itoa, _i64toa, _ui64toa, _itow, _i64tow, _ui64tow, _itoa_s, _i64toa_s, _ui64toa_s, _itow_s, _i64tow_s, _ui64tow_s	Convert int or __int64 to string
_ltoa, _ltow, _ltoa_s, _ltow_s	Convert long to string
strtod, _strtod_l, wcstod, _wcstod_l	Convert string to double
strtol, wcstol, _strtol_l, _wcstol_l	Convert string to long integer
strtoul, _strtoul_l, wcstoul, _wcstoul_l	Convert string to unsigned long integer
_ultoa, _ultow, _ultoa_s, _ultow_s	Convert unsigned long to string
atof, _atof_l, _wtof, _wtof_l	Convert wide-character string to a double
atoi, _atoi_l, _wtoi, _wtoi_l	Convert wide-character string to int
_atoi64, _atoi64_l, _wtoi64, _wtoi64_l	Convert wide-character string to __int64
atol, _atol_l, _wtol, _wtol_l	Convert wide-character string t