printf Type Field Characters & Size Specification
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MSDN : printf Type Field Characters
MSDN : Size Specification
printf Type Field Characters
Character | Type | Output format |
|---|---|---|
c | int orwint_t | When used with printf functions, specifies a single-byte character; when used with wprintf functions, specifies a wide character. |
C | int orwint_t | When used with printf functions, specifies a wide character; when used with wprintf functions, specifies a single-byte character. |
d | int | Signed decimal integer. |
i | int | Signed decimal integer. |
o | int | Unsigned octal integer. |
u | int | Unsigned decimal integer. |
x | int | Unsigned hexadecimal integer, using "abcdef." |
X | int | Unsigned hexadecimal integer, using "ABCDEF." |
e | double | Signed value having the form [ – ]d.dddd e [sign]dd[d] where d is a single decimal digit, dddd is one or more decimal digits, dd[d] is two or three decimal digits depending on the output format and size of the exponent, and sign is + or –. |
E | double | Identical to the e format except that E rather than e introduces the exponent. |
f | double | Signed value having 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. |
g | double | Signed value printed 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 | double | Identical to the g format, except that E, rather than e, introduces the exponent (where appropriate). |
a | double | Signed hexadecimal double precision floating point value having the form [−]0xh.hhhh p±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 | double | Signed hexadecimal double precision floating point value having the form [−]0Xh.hhhh P±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 successfully written so far to the stream or buffer; this value is stored in the integer whose address is given as the argument. See Security Note below. |
p | Pointer to void | Prints the argument as an address in hexadecimal digits. |
s | String | When used with printf functions, specifies a single-byte–character string; when used with wprintf functions, specifies a wide-character string. Characters are printed 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–character string. Characters are printed up to the first null character or until the precision value is reached. |
Size Specification
To specify | Use prefix | With type specifier |
|---|---|---|
long int | l (lowercase L) | d, i, o, x, or X |
long unsigned int | l | o, u, x, or X |
long long | ll | d, i, o, x, or X |
short int | h | d, i, o, x, or X |
short unsigned int | h | o, u, x, or X |
__int32 | I32 | d, i, o, x, or X |
unsigned __int32 | I32 | o, u, x, or X |
__int64 | I64 | d, i, o, x, or X |
unsigned __int64 | I64 | o, u, x, or X |
ptrdiff_t (that is, __int32 on 32-bit platforms, __int64 on 64-bit platforms) | I | d, i, o, x, or X |
size_t (that is, unsigned __int32 on 32-bit platforms, unsigned __int64 on 64-bit platforms) | I | o, u, x, or X |
long double | l or L | f |
Single-byte character with printf functions | h | c or C |
Single-byte character with wprintf functions | h | c or C |
Wide character with printf functions | l | c or C |
Wide character with wprintf functions | l | c or C |
Single-byte – character string with printf functions | h | s or S |
Single-byte – character string with wprintf functions | h | s or S |
Wide-character string with printf functions | l | s or S |
Wide-character string with wprintf functions | l | s or S |
Wide character | w | c |
Wide-character string | w | s |
Thus to print single-byte or wide-characters with printf functions and wprintf functions, use format specifiers as follows.
To print character as | Use function | With format specifier |
|---|---|---|
single byte | printf | c, hc, or hC |
single byte | wprintf | C, hc, or hC |
wide | wprintf | c, lc, lC, or wc |
wide | printf | C, lc, lC, or wc |
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