26 lines
710 B
Modula-2
26 lines
710 B
Modula-2
DEFINITION MODULE RealInOut;
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VAR Done: BOOLEAN;
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PROCEDURE ReadReal(VAR x: REAL);
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(* Read a real number "x" according to the syntax:
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['+'|'-'] digit {digit} ['.' digit {digit}]
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[('E'|'e') ['+'|'-'] digit {digit}]
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Done := "a number was read".
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Input terminates with a blank or any control character.
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When reading from a terminal, backspacing may be done by either
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DEL or BACKSPACE, depending on the implementation of ReadString.
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*)
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PROCEDURE WriteReal(x: REAL; n: CARDINAL);
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(* Write x using n characters.
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If fewer than n characters are needed, leading blanks are inserted.
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*)
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PROCEDURE WriteRealOct(x: REAL);
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(* Write x in octal words.
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*)
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END RealInOut.
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