格式化字符串（国外英文资料）.docVIP

格式化字符串（国外英文资料） Formatted string The function Format (const Format: string; const Args: array of const) : string; The Format string specification: % [index :] [ ] [ ] [ ] The formatting string must start with % (2) the index refers to the sequence number of each item shown in the Args parameter list. Such as: the Args is [ a , c], then a has an index of 0, and c has an index of 1, and only because of it Two terms, so there will be no more than one index. Format ( % 2: s % 1: s, 1st, 2nd, 3rd); Result: 32nd 1st (3) [ - ] this identifier is used to fill Spaces on the right when the number of characters to display is less than [width]. If you dont add [ - ], fill the blanks on the left. Format ( (% 4s) , [ aa ]); Results: aa (4) [width] width Specifies the number of characters to display. If the width to display is greater than [width], then it is practical The width is shown; Instead, fill in the blanks or fill other characters as required. (5) [.prec] accuracy This is for floating-point Numbers, which is the number of digits after the decimal point. (6) type type (see below) The possible value of type has the following: (1) d has a decimal number Args has to be a symbol integer. If you also include [. prec] in the format string, if Args If the length is less than the number given, fill 0 in the front. If it is greater than the number of precision, it is shown by the actual length. Format ( (%. 3d) ); Results: (099) (2) u unsigned decimal number Args must be unsigned integer. Other properties are the same as d. (3) e science and technology Using the science and technology method to display the data, the form is as follows: - d.d dd... E + DDD . The Args must be a floating-point number. If its a negative number, it shows a symbol at the front; In front of the decimal point Always display a number; The number of Numbers, including the number in front of the decimal point, is determined by [.prec ]. If not specified [.prec] , the default is 15. If the actual number is exc