sprintf Conversion Specifiers

Conversion specifiers: %a(%A) floating point number, hexadecimal number and p-(P-) notation (C99) %c character %d signed decimal integer %f floating point number (including float and doulbe) %e(%E) floating point number exponential output [e-(E-) notation] %g(%G) floating point number does not display meaningless zero "0" %i signed decimal integer (same as %d) %u unsigned decimal integer %o octal integer eg 0123 %x(%X) hexadecimal integer 0f(0F) eg 0x1234 %p pointer %s string %% "%" 2. Left alignment of sign: "-" eg "%-20s" Right alignment: "+" eg "%+20s" Space: If the sign is positive, a space is displayed, if it is negative, "-" is displayed eg "% 6.2f" #: No effect on c, s, d, u; for o, add a prefix o when output; for x, add a prefix 0x when output; for e, g, f, only give a decimal point when the result has a decimal. 3. Format string (format) 〔Sign〕〔Minimum output width〕〔． Precision〕〔Length〕Type "%-md": Left alignment, if m is less than the actual value, output according to the actual value. "%m.ns": output m digits, take n digits from the left of the string, fill with spaces on the left, when n>m or m is omitted, m=n eg "%7.2s" input CHINA output "CH" "%m.nf": output floating point number, m is the width, n is the number of digits to the right of the decimal point eg "%3.1f" input 3852.99 output 3853.0 Length: h is a short integer, l is a long integer