%a(%A) floating-point number, hexadecimal number and p-(P-) notation (C99)

%c character

%d signed decimal integers

%f floating-point numbers (including float and doulbe)

%e(%E) floating-point exponent output [e-(E-) notation]

%g(%G) floating-point numbers do not display meaningless zero "0".

%i signed decimal integer (same as %d)

%u unsigned decimal integers

%o octal integer, such as 0 123.

%x(%X) hexadecimal integer 0f(0F), such as 0x 1234.

%p pointer

%s string

%% "%"

mark

Left alignment: "-"For example, "%-20s"

Right alignment: "+"For example: "%+20s"

Spaces: If the symbol is positive, spaces will be displayed; If it is negative, a "-"sign will be displayed, for example, "%6.2f".

#: It has no influence on classes C, S, D and U; For class o, prefix o when outputting; For class X, the prefix 0x is output;

For classes E, G, F, G and F, the decimal point is given only when the result has a decimal point.

3. Format string (format)

[Mark] [Output Minimum Width] [. Accuracy] [Length] type

"%-MD": Left-aligned. If m is less than the actual value, it is output according to the actual value.

"%m.ns": output m bits, take n bits of the string (from the left), and fill in the space on the left. When n >; When m or m is omitted, m = n.

For example, "%7.2s" is entered into China.

Output "CH"

"%m.nf": outputs floating-point numbers, where m is the width and n is the number to the right of the decimal point.

For example, "%3. 1f" enters 3852.99.

Output 3853.0

Length: h short molding quantity, l long molding quantity.

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