Remote-processing BASIC 52 Instrukcja Użytkownika Pobierz pdf (Strona 31)

RPBASIC-52 PROGRAMMING GUIDE

2-12

CHR

Syntax: CHR(expr)

CHR( string, positi on)

Where: expr = number from 0 to 255

string = string variable

position = 1 to length of string

Function: Converts expr to ASCII character or prints string at position

Mode: Command, run

Use: PRINT CHR (65)

PRINT CH R($(0),1)

Cards: All

DESCRIPTION

CHR is a dual use ope rator, similar to AS C. One version converts a numeric expression to an ASCII

character, allowing a variety of string manipulation operations. The second version uses CHR to print

individual ch aracte rs in an A SCII s tring. expr is a decimal number and truncates numbers from 0 through

65535. There must be no space between C HR and the left pa renthe ses or an AR RAY SIZ E error results .

Although expr can be any integer, printable AS CII characters range from 20 H through 7EH (32 through 127).

The STR function may be used to m anipulate and print longer portions of strings.

ASC, STR, STRING

ERRORS

BAD ARGUMENT expr can't be truncated to an integer (0 through 65535)

ARRAY SIZE space between CHR and left parentheses

EXAMPLE

10 STRING 200,20

20 $(1)="1234567890"

30 FOR N=64 TO 80

40 PRINT CHR(N),

50 NEXT

60 PRINT

70 FOR N=1 TO 9

80 PRINT CHR($(1),N),

90 NEXT

RUN

@ABCDEFGHIJKLMNOP

1234567890

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 162 163

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Remote-processing BASIC 52 Instrukcja Użytkownika Strona 31