RosettaCodeData/Task/Copy-a-string/Simula/copy-a-string.simula

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BEGIN
TEXT ORIGINAL, REFERENCE, COPY1;
ORIGINAL :- "THIS IS CONSTANT TEXT";
ORIGINAL.SETPOS(1);
REFERENCE :- ORIGINAL;
! RUN TIME ERROR:
! ORIGINAL.PUTCHAR('X');
! "copy-a-string.sim", line 9: ./copy-a-string: Putchar: Constant text object
;
OUTTEXT(ORIGINAL);
OUTIMAGE;
! CONTENT EQUAL? => T ;
OUTTEXT(IF ORIGINAL = REFERENCE THEN "T" ELSE "F");
OUTIMAGE;
! SAME TEXT OBJECT? => T ;
OUTTEXT(IF ORIGINAL == REFERENCE THEN "T" ELSE "F");
OUTIMAGE;
COPY1 :- COPY(ORIGINAL);
COPY1.SETPOS(1);
COPY1.PUTCHAR('X');
OUTTEXT(COPY1);
OUTIMAGE;
END;