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Modula Definition | 1988-11-19 | 1.5 KB | 51 lines |
- 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.