Argox PA-20 Programming Guide Bedienungsanleitung PDF herunterladen (Seite 74)

PT-20 Programming Guide

successfully read, converted, and saved in variables. A return value equal

to EOF means that an end-of-file was encountered during the read

operation.

_scanf_color_DefaultStr

Purpose：

Use _scanf_color_DefaultStr to set a default string in input and 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_DefaultStr(int color, char* assDefaultStr, const char

*format, ...);

Example call：

char assBuffer[10] = “ABC”;

_scanf_color_DefaultStr(COLOR_RED, assBuffer , “%s”, assBuffer);

Includes：

#include “SDK.h ”

Description：

The _scanf_color_DefaultStr 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_DefaultStr.

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_DefaultStr to ignore whitespace

characters from keyboard. Other nonwhitespace characters, excluding

the % sign, cause _scanf_color_DefaultStr 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_DefaultStr, there must be a format specification embedded

in the format. For the complete format specification accepted by the

_scanf_color_DefaultStr 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_DefaultStr function returns the number of input items

that were successfully read, converted, and saved in variables. A return

value equal to EOF means that an end-of-file was encountered during the

read operation.

_scanf_ctrl_ScannerStatus

Purpose：

Set scanner on/off when use “_scanf_color” function.

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