RosettaCodeData/Task/File-input-output/IS-BASIC/file-input-output.basic

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100 STRING TX$*254
110 OPEN #1:"output.txt"
120 OPEN #2:"input.txt" ACCESS OUTPUT
130 WHEN EXCEPTION USE IOERROR
140 DO
150 LINE INPUT #1:TX$
160 PRINT #2:TX$
170 LOOP
180 END WHEN
190 HANDLER IOERROR
200 IF EXTYPE<>8001 THEN PRINT EXSTRING$(EXTYPE)
210 CLOSE #1
220 CLOSE #2
230 END HANDLER