$display()系统函数常见打印选项

Argument	Description
\n	Newline character
\t	Tab character
\\	\ character
\"	" character
\v	Vertical tab
\f	Form feed
\a	% character
\ddd	A character specified in 1 to 3 octal digits, where 0 ≤ d ≤ 7. If fewer than three characters are used, the following character shall not be an octal digit. Implementations may issue an error if the character represented is greater than \377.
\xdd	A character specified in 2 hexadecimal digits, where 0 ≤ d ≤ F
%h or %H %x or %X	Display in hexadecimal format
%d or %D	Display in decimal format
%o or %O	Display in octal format
%b or %B	Display in binary format
%c or %C	Display in ASCII character format
%l or %L	Display library binding information
%v or %V	Display net signal strength
%m or %M	Display hierarchical name
%p or %P	Display as an assignment pattern
%s or %S	Display as a string
%t or %T	Display in current time format
%u or %U	Unformatted 2 value data
%z or %Z	Unformatted 4 value data
%e or %E	Display real numbers in an exponential format
%f or %F	Display real numbers in a decimal format
%g or %G	Display real numbers in exponential or decimal format, whichever format results in the shorter printed output

Useful SystemVerilog System Tasks

1、$sscanf(str,format,args);——$sscanf 将字符串按照某个模板格式进行扫描，其字符串格式和C语言中的printf()函数类似

2、$sformat(str,format,args);——$sformat是$sscanf的反函数。将字符串按照给定的格式填入相应的参数args中；

3、$display(format,args);——$display就是Verilog的printf语句，在stdout上显示格式化的字符串；

4、$sformatf(format,args);——$sformatf任务和$sformat相似，除了其返回字符串结果。字符串作为$sformatf的返回值，而不是像$sformt一样放在第一个参数上。