73 lines
1.1 KiB
Plaintext
73 lines
1.1 KiB
Plaintext
(* Abbreviation: MathLib0 *)
|
||
(* Version 1.10, Nov 1984 *)
|
||
DEFINITION MODULE MathLib0;
|
||
(*
|
||
Real Math Functions
|
||
|
||
From the book 'Programming in Modula-2' by Prof.
|
||
N. Wirth.
|
||
*)
|
||
|
||
|
||
EXPORT QUALIFIED
|
||
sqrt, exp, ln, sin, cos, arctan, real, entier;
|
||
|
||
|
||
PROCEDURE sqrt(x: REAL): REAL;
|
||
(*
|
||
- returns square root x
|
||
|
||
x must be positive.
|
||
*)
|
||
|
||
|
||
PROCEDURE exp(x: REAL): REAL;
|
||
(*
|
||
- returns e^x where e = 2.71828..
|
||
*)
|
||
|
||
|
||
PROCEDURE ln(x: REAL): REAL;
|
||
(*
|
||
- returns natural logarithm with base e = 2.71828.. of x
|
||
|
||
x must be positive and not zero
|
||
*)
|
||
|
||
|
||
PROCEDURE sin(x: REAL): REAL;
|
||
(*
|
||
- returns sin(x) where x is given in radians
|
||
*)
|
||
|
||
|
||
PROCEDURE cos(x: REAL): REAL;
|
||
(*
|
||
- returns cos(x) where x is given in radians
|
||
*)
|
||
|
||
|
||
PROCEDURE arctan(x: REAL): REAL;
|
||
(*
|
||
- returns arctan(x) in radians
|
||
*)
|
||
|
||
|
||
PROCEDURE real(x: INTEGER): REAL;
|
||
(*
|
||
- type conversion from INTEGER to REAL
|
||
*)
|
||
|
||
PROCEDURE entier(x: REAL): INTEGER;
|
||
(*
|
||
- returns the largest integer number less or equal x
|
||
|
||
Examples: entier(1.5) = 1; entier(-1.5) = -2;
|
||
|
||
If x cannot be represented in an INTEGER, the result is
|
||
undefined.
|
||
*)
|
||
|
||
|
||
END MathLib0.
|
||
|