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REALCONV.DEF
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2000-09-26
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DEFINITION MODULE RealConversions;
(* (C) Copyright 1987,1988 Fitted Software Tools. All rights reserved. *)
PROCEDURE RealToString( x :REAL; decDigits, n :INTEGER;
VAR s :ARRAY OF CHAR; VAR ok :BOOLEAN );
(*
Converts x to an ASCII representation.
n is the width of the ASCII field.
ABS(decDigits) is the number of decimal digits desired.
s is where the result is placed.
ok is set to TRUE is the conversion was successful.
The output in s is in fixed point notation if decDigits is positive;
otherwise, x is represented in scientific notation.
If n is greater than the number of characters needed for the conversion,
s is padded with spaces on the left.
If decDigits > 0 then n must be >= decDigits+2
else n must be >= ABS(decDigits)+7
Examples:
RealToString( 1.148, 2, 6, s, ok ) would place in s:
" 1.15"
RealToString( 1.148, -2, 10, s, ok ) would place in s:
" 1.15E+00"
*)
PROCEDURE StringToReal( s :ARRAY OF CHAR; VAR x :REAL; VAR ok :BOOLEAN );
(*
converts the string s into a REAL number.
a real in the format defined for Modula-2 REAL literals is expected.
*)
PROCEDURE LongRealToString( x :LONGREAL; decDigits, n :INTEGER;
VAR s :ARRAY OF CHAR; VAR ok :BOOLEAN );
(*
works like RealToString
*)
PROCEDURE StringToLongReal( s :ARRAY OF CHAR;
VAR x :LONGREAL; VAR ok :BOOLEAN );
(*
works like StringToReal
*)
END RealConversions.