C printf () function conversion specifier

1. Conversion specifier

Conversion instructions	Output
%a	Floating-point numbers, hexadecimal numbers, and p-counting methods
%A	Floating-point numbers, hexadecimal numbers, and p-counting methods
%c	A character
%d	Signed Decimal
%e	Floating-point number, E-counting method
%E	Floating-point number, E-counting method
%f	Floating-point, decimal-counting method
%g	Automatically select the%f or%e.%e format when the exponent is less than-4 or greater than or equal to the precision based on the value
%G	Automatically select the%f or%e.%e format when the exponent is less than-4 or greater than or equal to the precision based on the value
%i	Signed decimal with D
%o	Unsigned 8 binary
%p	Pointer
%s	String
%u	unsigned decimal
%x	Use a hexadecimal 0f unsigned integer
%x	Use a hexadecimal 0F unsigned integer
%%	Print a percent semicolon

2. Conversion Descriptor Modifiers

Modifier	Significance
Sign	Five flags:-, +, space, #和0
Digit (s)	Field width Minimum value e.%4d
. Digit (s)	Precision. Corresponds to%e,%e, and%f conversions, which are the digits of the number that will be printed to the right of the decimal point.
H	Used with integer conversions to represent an integer type of short
hh	Used with integer conversion specifiers to represent a singed char or unsigned char
L	Used with integer conversions to represent an integer type of long
L	Used with floating-point type conversions to indicate a float type of type long
T	Used in conjunction with integer conversions to represent a ptrdiff_t
Z	Used with integer conversions to represent a size_t (sizeof return type) E.%ZD

3. Logo

/tr>

Span style= "FONT-SIZE:14PX;" > -	Project left-aligned E. "%-20s"
+	displays the sign of the value E. "+6.2f"
(space) span>	signed with a leading space; if negative, displays a minus sign
Span style= "FONT-SIZE:14PX;" > #	E.% #o
0	For all number formats, the field width is filled with leading zeros instead of spaces, or if the specified precision is omitted.

C printf () function conversion specifier