Some output formats for C languages

%e printf () a type of floating-point number that is scientifically represented by the output format

1.24==1.240000e+000 1240000==1.240000e+006 index must not exceed 3 digits 0.00124==1.240000e-003%g printf () One output The format type, which represents the output of a single, double-precision real number in the short output width of the%f,%e, using the%e format when the exponent is less than 4 or greater than or equal to precision (the%g is used to print floating-point data, the extra 0 is removed, and at most six digits are retained (unlike the%e default reserved decimal point 6) G used to print floating-point data more than 6 bits, because of the accuracy problem,%f had to output an imprecise number of more than six digits,%e is the same, and%g will choose%e format for output, and press the first requirement, remove the extra 0, and rounded to 6 digits. This "C Primer Plus" is said to exceed the accuracy of the situation. (Visible, this 6-bit, is calculated according to the float type precision))Several output formats for the printf () function

C Output Single character

D output signed integers in decimal form (positive numbers do not output symbols)

E output single-and double-precision real-number indices in exponential form as E

E output single-and double-precision real-number indices in exponential form as E

F output single, double-precision real numbers in decimal form

G output single, double-precision real numbers with shorter output widths in%f%e, using%e format when exponent is less than 4 or greater than or equal to precision

I signed decimal integer (same as%d)

o Output unsigned integers in eight binary form (do not output prefix O)

P Output memory address form data (16 binary)

S output string

x output unsigned integers in 16-binary form (not output prefix ox)

X output unsigned integers in 16-binary form (not output prefix ox)

U output unsigned integers in decimal form

Some output formats for C languages