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Modula Definition | 1988-06-14 | 1.3 KB | 39 lines |
- (* $N- *)
- DEFINITION MODULE LongRealConversions; (* jr/28mai87 *)
-
- PROCEDURE StrToReal(VAR s: ARRAY OF CHAR; VAR r: LONGREAL;
- VAR err: BOOLEAN);
-
- (* Converts input string 's' to a real number 'r'.
-
- Possible error conditions:
- - 's' has a syntactical error
- - 'r' would be too large for a LONGREAL
- *)
-
-
- PROCEDURE RealToStr(r: LONGREAL; VAR s: ARRAY OF CHAR;
- m, n: INTEGER; expo: BOOLEAN; VAR err: BOOLEAN);
-
- (* Converts the real number 'r' to output string 's'. The output string will
- have a length of EXACTLY 'm' characters (or length of 's' if 'm' is too
- large). 'n' is the number of places behind the decimal point. If 'n' is too
- large in respect to 'm' it will be shortened to the maximum possible.If 'n'
- is zero then the decimal point will be omitted. With 'expo' you can choose
- the exponential mode of output.
- A few examples: r=12.976 m n expo s
- 5 2 FALSE '12.98'
- 4 2 FALSE '13.0'
- 3 2 FALSE ' 13'
- 2 2 FALSE '13'
- 1 2 FALSE # err #
- -8 2 FALSE '12.98 '
- 10 2 TRUE ' 1.30E+01'
-
- Possible error conditions:
- - 'm' is zero OR 'n' is negative
- - 's' is to small to hold the string representing 'r'
- *)
-
- END LongRealConversions.
-