Is this what the script means? - means there are two digits. If there are less than two digits, a space will be automatically added as a placeholder; d also means two digits, and 0 is used here as a placeholder.
(name) is a named flags can have +,-,' or 0. + means right alignment. - means left alignment. '˜' is a space, which means padding a space to the left of the positive number to align it with the negative number. 0 means use 0 padding. width represents the display width precision represents the precision after the decimal point
The%02d表示用0padding here is filled with spaces by default. For details, please refer to string formatting (% operator)
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The
%02d表示用0padding here is filled with spaces by default. For details, please refer to string formatting (% operator)