Visual C++ 32 Bit

Visual C++ 32 Bit

-->Dec 30, 2014 These packages install run-time components of these libraries: C Runtime (CRT), Standard C, ATL, MFC, C AMP, and OpenMP. For an updated version of these redistributable packages, see KB 3138367. Microsoft Visual C Sp1 Bit 32 free download - Microsoft Visual C 2005 SP1 Redistributable Package (x86), Microsoft Visual C 2008 SP1 Redistributable Package (x86), Microsoft Visual C 2010. This package installs runtime components of C Runtime (CRT), Standard C, ATL, MFC, OpenMP and MSDIA libraries. This will install both the 32 and 64 bit versions on a 64 bit OS. The 32 bit version will only be installed on a 32 bit OS. Latest supported Visual C downloads. Aug 09, 2011 A security issue has been identified leading to a vulnerability in MFC applications that are built with Visual Studio 2010 and ship the Microsoft Visual C 2010 Service Pack 1 Redistributable Package.
The various printf and wprintf functions take a format string and optional arguments and produce a formatted sequence of characters for output. The format string contains zero or more directives, which are either literal characters for output or encoded conversion specifications that describe how to format an argument in the output. This article describes the syntax used to encode conversion specifications in the format string. For a listing of these functions, see Stream I/O.
A conversion specification consists of optional and required fields in this form:
%[flags][width][.precision][size]type
Each field of the conversion specification is a character or a number that signifies a particular format option or conversion specifier. The required type field specifies the kind of conversion to be applied to an argument. The optional flags, width, and precision fields control additional format aspects such as leading spaces or zeroes, justification, and displayed precision. The size field specifies the size of the argument consumed and converted.
A basic conversion specification contains only the percent sign and a type character. For example, %s specifies a string conversion. To print a percent-sign character, use %%. If a percent sign is followed by a character that has no meaning as a format field, the invalid parameter handler is invoked. For more information, see Parameter Validation.
Important
For security and stability, ensure that conversion specification strings are not user-defined. For example, consider a program that prompts the user to enter a name and stores the input in a string variable that's named user_name. To print user_name, do not do this:
printf( user_name ); /* Danger! If user_name contains '%s', program will crash */
Instead, do this:
printf( '%s', user_name );
Note
In Visual Studio 2015 The printf and scanf family of functions were declared as inline and moved to the  and  headers. If you are migrating older code you might see LNK2019 in connection with these functions. For more information, see Visual C++ change history 2003 - 2015.
Type conversion specifierThe type conversion specifier character specifies whether to interpret the corresponding argument as a character, a string, a pointer, an integer, or a floating-point number. The type character is the only required conversion specification field, and it appears after any optional fields.
The arguments that follow the format string are interpreted according to the corresponding type character and the optional size prefix. Conversions for character types char and wchar_t are specified by using c or C, and single-byte and multi-byte or wide character strings are specified by using s or S, depending on which formatting function is being used. Character and string arguments that are specified by using c and s are interpreted as char and char* by printf family functions, or as wchar_t and wchar_t* by wprintf family functions. Character and string arguments that are specified by using C and S are interpreted as wchar_t and wchar_t* by printf family functions, or as char and char* by wprintf family functions. This behavior is Microsoft-specific.

Visual C++ 32 Bit WindowsInteger types such as short, int, long, long long, and their unsigned variants, are specified by using d, i, o, u, x, and X. Floating-point types such as float, double, and long double, are specified by using a, A, e, E, f, F, g, and G. By default, unless they're modified by a size prefix, integer arguments are coerced to int type, and floating-point arguments are coerced to double. On 64-bit systems, an int is a 32-bit value; so, 64-bit integers will be truncated when they're formatted for output unless a size prefix of ll or I64 is used. Pointer types that are specified by p use the default pointer size for the platform.
Note
Microsoft-specific:
The Z type character, and the behavior of the c, C, s, and S type characters when they're used with the printf and wprintf functions, are Microsoft extensions. The ISO C standard uses c and s consistently for narrow characters and strings, and C and S for wide characters and strings, in all formatting functions.
Type field charactersType characterArgumentOutput format
cCharacterWhen used with printf functions, specifies a single-byte character; when used with wprintf functions, specifies a wide character.
CCharacterWhen used with printf functions, specifies a wide character; when used with wprintf functions, specifies a single-byte character.
dIntegerSigned decimal integer.
iIntegerSigned decimal integer.
oIntegerUnsigned octal integer.
uIntegerUnsigned decimal integer.
xIntegerUnsigned hexadecimal integer; uses 'abcdef'.
XIntegerUnsigned hexadecimal integer; uses 'ABCDEF'.
eFloating-pointSigned value that has the form [-]d.dddde±dd[d], where d is one decimal digit, dddd is one or more decimal digits depending on the specified precision, or six by default, and dd[d] is two or three decimal digits depending on the output format and size of the exponent.
EFloating-pointIdentical to the e format except that E rather than e introduces the exponent.
fFloating-pointSigned value that has the form [-]dddd.dddd, where dddd is one or more decimal digits. The number of digits before the decimal point depends on the magnitude of the number, and the number of digits after the decimal point depends on the requested precision, or six by default.
FFloating-pointIdentical to the f format except that infinity and nan output is capitalized.
gFloating-pointSigned values are displayed in f or e format, whichever is more compact for the given value and precision. The e format is used only when the exponent of the value is less than -4 or greater than or equal to the precision argument. Trailing zeros are truncated, and the decimal point appears only if one or more digits follow it.
GFloating-pointIdentical to the g format, except that E, rather than e, introduces the exponent (where appropriate).
aFloating-pointSigned hexadecimal double-precision floating-point value that has the form [-]0xh.hhhhp±dd, where h.hhhh are the hex digits (using lower case letters) of the mantissa, and dd are one or more digits for the exponent. The precision specifies the number of digits after the point.
AFloating-pointSigned hexadecimal double-precision floating-point value that has the form [-]0Xh.hhhhP±dd, where h.hhhh are the hex digits (using capital letters) of the mantissa, and dd are one or more digits for the exponent. The precision specifies the number of digits after the point.
nPointer to integerNumber of characters that are successfully written so far to the stream or buffer. This value is stored in the integer whose address is given as the argument. The size of the integer pointed at can be controlled by an argument size specification prefix. The n specifier is disabled by default; for information see the important security note.
pPointer typeDisplay the argument as an address in hexadecimal digits.
sStringWhen used with printf functions, specifies a single-byte or multi-byte character string; when used with wprintf functions, specifies a wide-character string. Characters are displayed up to the first null character or until the precision value is reached.
SStringWhen used with printf functions, specifies a wide-character string; when used with wprintf functions, specifies a single-byte or multi-byte character string. Characters are displayed up to the first null character or until the precision value is reached.
ZANSI_STRING or UNICODE_STRING structureWhen the address of an ANSI_STRING or UNICODE_STRING structure is passed as the argument, display the string contained in the buffer pointed to by the Buffer field of the structure. Use a size modifier prefix of w to specify a UNICODE_STRING argument—for example, %wZ. The Length field of the structure must be set to the length, in bytes, of the string. The MaximumLength field of the structure must be set to the length, in bytes, of the buffer.
Typically, the Z type character is used only in driver debugging functions that use a conversion specification, such as dbgPrint and kdPrint.
Starting in Visual Studio 2015, if the argument that corresponds to a floating-point conversion specifier (a, A, e, E, f, F, g, G) is infinite, indefinite, or NaN, the formatted output conforms to the C99 standard. This table lists the formatted output:

Type character	Argument	Output format
`c`	Character	When used with `printf` functions, specifies a single-byte character; when used with `wprintf` functions, specifies a wide character.
`C`	Character	When used with `printf` functions, specifies a wide character; when used with `wprintf` functions, specifies a single-byte character.
`d`	Integer	Signed decimal integer.
`i`	Integer	Signed decimal integer.
`o`	Integer	Unsigned octal integer.
`u`	Integer	Unsigned decimal integer.
`x`	Integer	Unsigned hexadecimal integer; uses '`abcdef`'.
`X`	Integer	Unsigned hexadecimal integer; uses '`ABCDEF`'.
`e`	Floating-point	Signed value that has the form [-]`d.dddd`e±`dd`[`d`], where `d` is one decimal digit, `dddd` is one or more decimal digits depending on the specified precision, or six by default, and `dd`[`d`] is two or three decimal digits depending on the output format and size of the exponent.
`E`	Floating-point	Identical to the `e` format except that `E` rather than `e` introduces the exponent.
`f`	Floating-point	Signed value that has the form [-]`dddd`.`dddd`, where `dddd` is one or more decimal digits. The number of digits before the decimal point depends on the magnitude of the number, and the number of digits after the decimal point depends on the requested precision, or six by default.
`F`	Floating-point	Identical to the `f` format except that infinity and nan output is capitalized.
`g`	Floating-point	Signed values are displayed in `f` or `e` format, whichever is more compact for the given value and precision. The `e` format is used only when the exponent of the value is less than -4 or greater than or equal to the precision argument. Trailing zeros are truncated, and the decimal point appears only if one or more digits follow it.
`G`	Floating-point	Identical to the `g` format, except that `E`, rather than `e`, introduces the exponent (where appropriate).
`a`	Floating-point	Signed hexadecimal double-precision floating-point value that has the form [-]0xh.hhhhp±`dd`, where h.hhhh are the hex digits (using lower case letters) of the mantissa, and `dd` are one or more digits for the exponent. The precision specifies the number of digits after the point.
`A`	Floating-point	Signed hexadecimal double-precision floating-point value that has the form [-]0Xh.hhhhP±`dd`, where h.hhhh are the hex digits (using capital letters) of the mantissa, and dd are one or more digits for the exponent. The precision specifies the number of digits after the point.
`n`	Pointer to integer	Number of characters that are successfully written so far to the stream or buffer. This value is stored in the integer whose address is given as the argument. The size of the integer pointed at can be controlled by an argument size specification prefix. The `n` specifier is disabled by default; for information see the important security note.
`p`	Pointer type	Display the argument as an address in hexadecimal digits.
`s`	String	When used with `printf` functions, specifies a single-byte or multi-byte character string; when used with `wprintf` functions, specifies a wide-character string. Characters are displayed up to the first null character or until the precision value is reached.
`S`	String	When used with `printf` functions, specifies a wide-character string; when used with `wprintf` functions, specifies a single-byte or multi-byte character string. Characters are displayed up to the first null character or until the precision value is reached.
`Z`	`ANSI_STRING` or `UNICODE_STRING` structure	When the address of an `ANSI_STRING` or `UNICODE_STRING` structure is passed as the argument, display the string contained in the buffer pointed to by the `Buffer` field of the structure. Use a size modifier prefix of `w` to specify a `UNICODE_STRING` argument—for example, `%wZ`. The `Length` field of the structure must be set to the length, in bytes, of the string. The `MaximumLength` field of the structure must be set to the length, in bytes, of the buffer. Typically, the `Z` type character is used only in driver debugging functions that use a conversion specification, such as `dbgPrint` and `kdPrint`.

ValueOutput
infinityinf
Quiet NaNnan
Signaling NaNnan(snan)
Indefinite NaNnan(ind)

Value	Output
infinity	`inf`
Quiet NaN	`nan`
Signaling NaN	`nan(snan)`
Indefinite NaN	`nan(ind)`

Any of these values may be prefixed by a sign. If a floating-point type conversion specifier character is a capital letter, then the output is also formatted in capital letters. For example, if the format specifier is %F instead of %f, an infinity is formatted as INF instead of inf. The scanf functions can also parse these strings, so these values can make a round trip through printf and scanf functions.
Before Visual Studio 2015, the CRT used a different, non-standard format for output of infinite, indefinite, and NaN values:
ValueOutput
+ infinity1.#INFrandom-digits
- infinity-1.#INFrandom-digits
Indefinite (same as quiet NaN)digit.#INDrandom-digits
NaNdigit.#NANrandom-digits
Any of these may have been prefixed by a sign, and may have been formatted differently depending on field width and precision, sometimes with unusual effects. For example, printf('%.2fn', INFINITY) prints 1.#J because the #INF would be 'rounded' to two digits of precision.
Note

Value	Output
+ infinity	`1.#INF`random-digits
- infinity	`-1.#INF`random-digits
Indefinite (same as quiet NaN)	digit`.#IND`random-digits
NaN	digit`.#NAN`random-digits

If the argument that corresponds to %s or %S, or the Buffer field of the argument that corresponds to %Z, is a null pointer, '(null)' is displayed.
Note
In all exponential formats, the minimum number of digits of exponent to display is two, using three only if necessary. By using the _set_output_format function, you can set the number of digits displayed to three for backward compatibility with code written for Visual Studio 2013 and before.

Visual C++ 32 Bit WindowsInteger types such as short, int, long, long long, and their unsigned variants, are specified by using d, i, o, u, x, and X. Floating-point types such as float, double, and long double, are specified by using a, A, e, E, f, F, g, and G. By default, unless they're modified by a size prefix, integer arguments are coerced to int type, and floating-point arguments are coerced to double. On 64-bit systems, an int is a 32-bit value; so, 64-bit integers will be truncated when they're formatted for output unless a size prefix of ll or I64 is used. Pointer types that are specified by p use the default pointer size for the platform.
Note
Microsoft-specific:
The Z type character, and the behavior of the c, C, s, and S type characters when they're used with the printf and wprintf functions, are Microsoft extensions. The ISO C standard uses c and s consistently for narrow characters and strings, and C and S for wide characters and strings, in all formatting functions.
Type field charactersType characterArgumentOutput format
cCharacterWhen used with printf functions, specifies a single-byte character; when used with wprintf functions, specifies a wide character.
CCharacterWhen used with printf functions, specifies a wide character; when used with wprintf functions, specifies a single-byte character.
dIntegerSigned decimal integer.
iIntegerSigned decimal integer.
oIntegerUnsigned octal integer.
uIntegerUnsigned decimal integer.
xIntegerUnsigned hexadecimal integer; uses 'abcdef'.
XIntegerUnsigned hexadecimal integer; uses 'ABCDEF'.
eFloating-pointSigned value that has the form [-]d.dddde±dd[d], where d is one decimal digit, dddd is one or more decimal digits depending on the specified precision, or six by default, and dd[d] is two or three decimal digits depending on the output format and size of the exponent.
EFloating-pointIdentical to the e format except that E rather than e introduces the exponent.
fFloating-pointSigned value that has the form [-]dddd.dddd, where dddd is one or more decimal digits. The number of digits before the decimal point depends on the magnitude of the number, and the number of digits after the decimal point depends on the requested precision, or six by default.
FFloating-pointIdentical to the f format except that infinity and nan output is capitalized.
gFloating-pointSigned values are displayed in f or e format, whichever is more compact for the given value and precision. The e format is used only when the exponent of the value is less than -4 or greater than or equal to the precision argument. Trailing zeros are truncated, and the decimal point appears only if one or more digits follow it.
GFloating-pointIdentical to the g format, except that E, rather than e, introduces the exponent (where appropriate).
aFloating-pointSigned hexadecimal double-precision floating-point value that has the form [-]0xh.hhhhp±dd, where h.hhhh are the hex digits (using lower case letters) of the mantissa, and dd are one or more digits for the exponent. The precision specifies the number of digits after the point.
AFloating-pointSigned hexadecimal double-precision floating-point value that has the form [-]0Xh.hhhhP±dd, where h.hhhh are the hex digits (using capital letters) of the mantissa, and dd are one or more digits for the exponent. The precision specifies the number of digits after the point.
nPointer to integerNumber of characters that are successfully written so far to the stream or buffer. This value is stored in the integer whose address is given as the argument. The size of the integer pointed at can be controlled by an argument size specification prefix. The n specifier is disabled by default; for information see the important security note.
pPointer typeDisplay the argument as an address in hexadecimal digits.
sStringWhen used with printf functions, specifies a single-byte or multi-byte character string; when used with wprintf functions, specifies a wide-character string. Characters are displayed up to the first null character or until the precision value is reached.
SStringWhen used with printf functions, specifies a wide-character string; when used with wprintf functions, specifies a single-byte or multi-byte character string. Characters are displayed up to the first null character or until the precision value is reached.
ZANSI_STRING or UNICODE_STRING structureWhen the address of an ANSI_STRING or UNICODE_STRING structure is passed as the argument, display the string contained in the buffer pointed to by the Buffer field of the structure. Use a size modifier prefix of w to specify a UNICODE_STRING argument—for example, %wZ. The Length field of the structure must be set to the length, in bytes, of the string. The MaximumLength field of the structure must be set to the length, in bytes, of the buffer.
Typically, the Z type character is used only in driver debugging functions that use a conversion specification, such as dbgPrint and kdPrint.
Starting in Visual Studio 2015, if the argument that corresponds to a floating-point conversion specifier (a, A, e, E, f, F, g, G) is infinite, indefinite, or NaN, the formatted output conforms to the C99 standard. This table lists the formatted output:
ValueOutput
infinityinf
Quiet NaNnan
Signaling NaNnan(snan)
Indefinite NaNnan(ind)
Any of these values may be prefixed by a sign. If a floating-point type conversion specifier character is a capital letter, then the output is also formatted in capital letters. For example, if the format specifier is %F instead of %f, an infinity is formatted as INF instead of inf. The scanf functions can also parse these strings, so these values can make a round trip through printf and scanf functions.
Before Visual Studio 2015, the CRT used a different, non-standard format for output of infinite, indefinite, and NaN values:
ValueOutput
+ infinity1.#INFrandom-digits
- infinity-1.#INFrandom-digits
Indefinite (same as quiet NaN)digit.#INDrandom-digits
NaNdigit.#NANrandom-digits
Any of these may have been prefixed by a sign, and may have been formatted differently depending on field width and precision, sometimes with unusual effects. For example, printf('%.2fn', INFINITY) prints 1.#J because the #INF would be 'rounded' to two digits of precision.
Note
If the argument that corresponds to %s or %S, or the Buffer field of the argument that corresponds to %Z, is a null pointer, '(null)' is displayed.
Note
In all exponential formats, the minimum number of digits of exponent to display is two, using three only if necessary. By using the _set_output_format function, you can set the number of digits displayed to three for backward compatibility with code written for Visual Studio 2013 and before.
Important
Because the %n format is inherently insecure, it's disabled by default. If %n is encountered in a format string, the invalid parameter handler is invoked, as described in Parameter Validation. To enable %n support, see _set_printf_count_output.
Flag directivesThe first optional field in a conversion specification contains flag directives, zero or more flag characters that specify output justification and control output of signs, blanks, leading zeros, decimal points, and octal and hexadecimal prefixes. More than one flag directive may appear in a conversion specification, and the flag characters can appear in any order.
Flag charactersFlagMeaningDefault
-Left align the result within the given field width.Right align.
+Use a sign (+ or -) to prefix the output value if it's of a signed type.Sign appears only for negative signed values (-).
0If width is prefixed by 0, leading zeros are added until the minimum width is reached. If both 0 and - appear, the 0 is ignored. If 0 is specified for an integer format (i, u, x, X, o, d) and a precision specification is also present—for example, %04.d—the 0 is ignored. If 0 is specified for the a or A floating-point format, leading zeros are prepended to the mantissa, after the 0x or 0X prefix.No padding.
blank (' ')Use a blank to prefix the output value if it's signed and positive. The blank is ignored if both the blank and + flags appear.No blank appears.
#When it's used with the o, x, or X format, the # flag uses 0, 0x, or 0X, respectively, to prefix any nonzero output value.No blank appears.
When it's used with the e, E, f, F, a, or A format, the # flag forces the output value to contain a decimal point.Decimal point appears only if digits follow it.
When it's used with the g or G format, the # flag forces the output value to contain a decimal point and prevents the truncation of trailing zeros.
 Ignored when used with c, d, i, u, or s.Decimal point appears only if digits follow it. Trailing zeros are truncated.
Width specificationIn a conversion specification, the optional width specification field appears after any flags characters. The width argument is a non-negative decimal integer that controls the minimum number of characters that are output. If the number of characters in the output value is less than the specified width, blanks are added to the left or the right of the values—depending on whether the left-alignment flag (-) is specified—until the minimum width is reached. If width is prefixed by 0, leading zeros are added to integer or floating-point conversions until the minimum width is reached, except when conversion is to an infinity or NaN.
The width specification never causes a value to be truncated. If the number of characters in the output value is greater than the specified width, or if width isn't provided, all characters of the value are output, subject to the precision specification.
If the width specification is an asterisk (*), an int argument from the argument list supplies the value. The width argument must precede the value that's being formatted in the argument list, as shown in this example:
printf('%0*d', 5, 3); /* 00003 is output */
A missing or small width value in a conversion specification doesn't cause the truncation of an output value. If the result of a conversion is wider than the width value, the field expands to contain the conversion result.
Precision specificationMicrosoft Visual C++ 32-bitIn a conversion specification, the third optional field is the precision specification. It consists of a period (.) followed by a non-negative decimal integer that, depending on the conversion type, specifies the number of string characters, the number of decimal places, or the number of significant digits to be output.
Unlike the width specification, the precision specification can cause either truncation of the output value or rounding of a floating-point value. If precision is specified as 0, and the value to be converted is 0, the result is no characters output, as shown in this example:
printf( '%.0d', 0 ); /* No characters output */
If the precision specification is an asterisk (*), an int argument from the argument list supplies the value. In the argument list, the precision argument must precede the value that's being formatted, as shown in this example:
Visual C++ (32 Bit Windows)printf( '%.*f', 3, 3.14159265 ); /* 3.142 output */
The type character determines either the interpretation of precision or the default precision when precision is omitted, as shown in the following table.
How Precision Values Affect TypeTypeMeaningDefault
a, AThe precision specifies the number of digits after the point.Default precision is 13. If precision is 0, no decimal point is printed unless the # flag is used.
c, CThe precision has no effect.Character is printed.
d, i, o, u, x, XThe precision specifies the minimum number of digits to be printed. If the number of digits in the argument is less than precision, the output value is padded on the left with zeros. The value isn't truncated when the number of digits exceeds precision.Default precision is 1.
e, EThe precision specifies the number of digits to be printed after the decimal point. The last printed digit is rounded.Default precision is 6. If precision is 0 or the period (.) appears without a number following it, no decimal point is printed.
f, FThe precision value specifies the number of digits after the decimal point. If a decimal point appears, at least one digit appears before it. The value is rounded to the appropriate number of digits.Default precision is 6. If precision is 0, or if the period (.) appears without a number following it, no decimal point is printed.
g, GThe precision specifies the maximum number of significant digits printed.Six significant digits are printed, and any trailing zeros are truncated.
s, SThe precision specifies the maximum number of characters to be printed. Characters in excess of precision aren't printed.Characters are printed until a null character is found.
Argument size specificationIn a conversion specification, the size field is an argument length modifier for the type conversion specifier. The size field prefixes to the type field—hh, h, j, l (lowercase L), L, ll, t, w, z, I (uppercase i), I32, and I64—specify the 'size' of the corresponding argument—long or short, 32-bit or 64-bit, single-byte character or wide character—depending on the conversion specifier that they modify. These size prefixes are used with type characters in the printf and wprintf families of functions to specify the interpretation of argument sizes, as shown in the following table. The size field is optional for some argument types. When no size prefix is specified, the formatter consumes integer arguments—for example, signed or unsigned char, short, int, long, and enumeration types—as 32-bit int types, and float, double, and long double floating-point arguments are consumed as 64-bit double types. This behavior matches the default argument promotion rules for variable argument lists. For more information about argument promotion, see Ellipsis and Default Arguments in Postfix expressions. On both 32-bit and 64-bit systems, the conversion specification of a 64-bit integer argument must include a size prefix of ll or I64. Otherwise, the behavior of the formatter is undefined.
Some types are different sizes in 32-bit and 64-bit code. For example, size_t is 32 bits long in code compiled for x86, and 64 bits in code compiled for x64. To create platform-agnostic formatting code for variable-width types, you can use a variable-width argument size modifier. Instead, use a 64-bit argument size modifier and explicitly promote the variable-width argument type to 64 bits. The Microsoft-specific I (uppercase i) argument size modifier handles variable-width integer arguments, but we recommend the type-specific j, t, and z modifiers for portability.
Size Prefixes for printf and wprintf Format-Type SpecifiersTo specifyUse prefixWith type specifier
char
unsigned charhhd, i, o, u, x, or X
short int
short unsigned inthd, i, o, u, x, or X
__int32
unsigned __int32I32d, i, o, u, x, or X
__int64
unsigned __int64I64d, i, o, u, x, or X
intmax_t
uintmax_tj or I64d, i, o, u, x, or X
long doublel (lowercase L) or La, A, e, E, f, F, g, or G
long int
long unsigned intl (lowercase L)d, i, o, u, x, or X
long long int
unsigned long long intll (lowercase LL)d, i, o, u, x, or X
ptrdiff_tt or I (uppercase i)d, i, o, u, x, or X
size_tz or I (uppercase i)d, i, o, u, x, or X
Single-byte characterhc or C
Wide characterl (lowercase L) or wc or C
Single-byte character stringhs, S, or Z
Wide-character stringl (lowercase L) or ws, S, or Z
The ptrdiff_t and size_t types are __int32 or unsigned __int32 on 32-bit platforms, and __int64 or unsigned __int64 on 64-bit platforms. The I (uppercase i), j, t, and z size prefixes take the correct argument width for the platform.
In Visual C++, although long double is a distinct type, it has the same internal representation as double.
Visual C++ 32 Bit WindowsAn hc or hC type specifier is synonymous with c in printf functions and with C in wprintf functions. A lc, lC, wc, or wC type specifier is synonymous with C in printf functions and with c in wprintf functions. An hs or hS type specifier is synonymous with s in printf functions and with S in wprintf functions. An ls, lS, ws, or wS type specifier is synonymous with S in printf functions and with s in wprintf functions.
Note
Visual C++ 32 Bit 2010Microsoft-specific:
The I (uppercase i), I32, I64, and w argument size modifier prefixes are Microsoft extensions and are not ISO C-compatible. The h prefix when it's used with data of type char and the l (lowercase L) prefix when it's used with data of type double are Microsoft extensions.
See alsoDownload Microsoft Visual C++ 32-bit 2015printf, _printf_l, wprintf, _wprintf_l
printf_s, _printf_s_l, wprintf_s, _wprintf_s_l
printf_p Positional Parameters

To specify	Use prefix	With type specifier
`char` `unsigned char`	`hh`	`d`, `i`, `o`, `u`, `x`, or `X`
`short int` `short unsigned int`	`h`	`d`, `i`, `o`, `u`, `x`, or `X`
`__int32` `unsigned __int32`	`I32`	`d`, `i`, `o`, `u`, `x`, or `X`
`__int64` `unsigned __int64`	`I64`	`d`, `i`, `o`, `u`, `x`, or `X`
`intmax_t` `uintmax_t`	`j` or `I64`	`d`, `i`, `o`, `u`, `x`, or `X`
`long double`	`l` (lowercase L) or `L`	`a`, `A`, `e`, `E`, `f`, `F`, `g`, or `G`
`long int` `long unsigned int`	`l` (lowercase L)	`d`, `i`, `o`, `u`, `x`, or `X`
`long long int` `unsigned long long int`	`ll` (lowercase LL)	`d`, `i`, `o`, `u`, `x`, or `X`
`ptrdiff_t`	`t` or `I` (uppercase i)	`d`, `i`, `o`, `u`, `x`, or `X`
`size_t`	`z` or `I` (uppercase i)	`d`, `i`, `o`, `u`, `x`, or `X`
Single-byte character	`h`	`c` or `C`
Wide character	`l` (lowercase L) or `w`	`c` or `C`
Single-byte character string	`h`	`s`, `S`, or `Z`
Wide-character string	`l` (lowercase L) or `w`	`s`, `S`, or `Z`

Flag	Meaning	Default
`-`	Left align the result within the given field width.	Right align.
`+`	Use a sign (+ or -) to prefix the output value if it's of a signed type.	Sign appears only for negative signed values (-).
`0`	If width is prefixed by `0`, leading zeros are added until the minimum width is reached. If both `0` and `-` appear, the `0` is ignored. If `0` is specified for an integer format (`i`, `u`, `x`, `X`, `o`, `d`) and a precision specification is also present—for example, `%04.d`—the `0` is ignored. If `0` is specified for the `a` or `A` floating-point format, leading zeros are prepended to the mantissa, after the `0x` or `0X` prefix.	No padding.
blank (' ')	Use a blank to prefix the output value if it's signed and positive. The blank is ignored if both the blank and + flags appear.	No blank appears.
`#`	When it's used with the `o`, `x`, or `X` format, the `#` flag uses `0`, `0x`, or `0X`, respectively, to prefix any nonzero output value.	No blank appears.
When it's used with the `e`, `E`, `f`, `F`, `a`, or `A` format, the `#` flag forces the output value to contain a decimal point.	Decimal point appears only if digits follow it.
When it's used with the `g` or `G` format, the `#` flag forces the output value to contain a decimal point and prevents the truncation of trailing zeros. Ignored when used with `c`, `d`, `i`, `u`, or `s`.	Decimal point appears only if digits follow it. Trailing zeros are truncated.

Type	Meaning	Default
`a`, `A`	The precision specifies the number of digits after the point.	Default precision is 13. If precision is 0, no decimal point is printed unless the `#` flag is used.
`c`, `C`	The precision has no effect.	Character is printed.
`d`, `i`, `o`, `u`, `x`, `X`	The precision specifies the minimum number of digits to be printed. If the number of digits in the argument is less than precision, the output value is padded on the left with zeros. The value isn't truncated when the number of digits exceeds precision.	Default precision is 1.
`e`, `E`	The precision specifies the number of digits to be printed after the decimal point. The last printed digit is rounded.	Default precision is 6. If precision is 0 or the period (`.`) appears without a number following it, no decimal point is printed.
`f`, `F`	The precision value specifies the number of digits after the decimal point. If a decimal point appears, at least one digit appears before it. The value is rounded to the appropriate number of digits.	Default precision is 6. If precision is 0, or if the period (`.`) appears without a number following it, no decimal point is printed.
`g`, `G`	The precision specifies the maximum number of significant digits printed.	Six significant digits are printed, and any trailing zeros are truncated.
`s`, `S`	The precision specifies the maximum number of characters to be printed. Characters in excess of precision aren't printed.	Characters are printed until a null character is found.