c语言disp函数_$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。