Denso Power Net Terminal BHT-7500 Dokumentacja Pobierz pdf (Strona 372)

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Chapter 15. Function Reference

363

Syntax:

Syntax 1 (Reading from the keyboard):

INPUT$(numcharas)

Syntax 2 (Reading from a device file):

INPUT$(numcharas,[#]filenumber)

Parameter:

numcharas

A numeric expression which returns a value from 1 to 255.

filenumber

A numeric expression which returns a value from 1 to 16.

Description:

INPUT$ reads the number of characters specified by numcharas from the key-

board or from a device file specified by

filenumber, then returns the resulting

string.

■ Syntax 1 (without specification of

filenumber)

INPUT$ reads a string or control codes from the keyboard.

•

INPUT$ does not echo back read characters on the LCD screen.

• The cursor shape (invisible, underlined, or full block) depends upon the specifica-

tion selected by the

LOCATE statement.

• If any key previously specified for keystroke trapping is pressed during execution

of the

INPUT$, the keyboard input will be ignored; that is, neither typed data is

read by

INPUT$ nor keystroke is trapped.

■ Syntax 2 (with specification of

filenumber)

INPUT$ reads from a device file (the bar code device file or any of the communica-

tions device files).

• The number of characters in a device file can be indicated by using a

LOC func-

tion.

INPUT File I/O function

INPUT$

Returns a specified number of characters read from the keyboard or from a device file.

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