C:/Musimathics_local/Musimat/MusimatTutorial/B0116.cpp File Reference

#include "MusimatTutorial.h"

Go to the source code of this file.

Functions
	MusimatTutorialSection (B0116)

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Function Documentation

MusimatTutorialSection

(

B0116

)

Definition at line 2 of file B0116.cpp.

References y.

                              {
Print("*** B.1.16 Conditional Statements ***");
/*****************************************************************************

B.1.16 Conditional Statements

A mathematical notation for determining the sign of a number is

                | x < 0, a
        y = |
                | x >= 0, b


which sets y to a if x is negative; otherwise it sets y to b. Such relational expressions are called 
predicates. Musimat accomplishes the same thing like this:
*****************************************************************************/

Real a = 1;
Real b = 2;
Real y = 5;

If (y < 0) 
  y = a;
Else 
  y = b;

/*****************************************************************************
In this example, y receives the value of a if y is less than 0; otherwise y receives the value of b. 
The Else part of this construction is optional. So for example,
*****************************************************************************/

If (a < b)
        Print(a);

/*****************************************************************************
prints a only if it is less than b. If and Else can be combined to allow chains of predicates:
*****************************************************************************/
Real r = -1.0;

If (a < 0)         // is x negative?
  y = a;
Else If (a == 0)   // it’s not negative, but is it zero?
  y = b;
Else               // neither negative nor zero, x must be positive
  y = r;

}}

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