Argox PA-20 Programming Guide - Manual (Page 73)

PT-20 Programming Guide 71
Returns： FALSE:set fail
TRUE:set success
GetScanKeyPwOn
Purpose： Get state for power on by scan key.
Syntax： BOOL GetScanKeyPwOn(void);
Example call： Int state;
state = GetScanKeyPwOn();
Includes： #include “SDK.h ”
Description： This function can get scan key power on state.
Returns： FALSE:scan key not power on.
TRUE:scan key power on.
_scanf_color
Purpose： Use _scanf_color to read character strings from the standard input file
and covert the strings to values of C variables according to specified
formats.
Syntax： int _scanf_color(int color, const char *format, ...);
Example call： char assBuffer[10];
_scanf_color(COLOR_R ED, “%s”, assBuffer);
Includes： #include “SDK.h ”
Description： The _scanf_color function accepts a variable number of arguments, which
it interprets as addresses of C variables, and reads character strings,
representing their values. It converts them to their internal representations
using formatting commands embedded in the argument format, which
must be present in a call to _scanf_color.
The interpretation of the variables depends on the forma. The formatting
command for each variable begins with a % sign and can contain other
characters as well. A whitespace character (a blank space, a tab, or a new
line) may cause _scanf_color to ignore whitespace characters from
keyboard. Other nonwhitespace characters, excluding the % sign, cause
_scanf_color to ignore each matching character from the input. It begins
to interpret the first nonmatching character as the value of variable that is
being read.
For each C variable whose address is included in the argument list to
_scanf_color, there must be a format specification embedded in the
format. For the complete format specification accepted by the
_scanf_color function, please refer to the scanf function in Turbo C++.
If you want input a float value, the value type is “ double “, not “ float “.
Returns： The _scanf_color function returns the number of input items that were