/Users/garethloy/Musimathics/Musimat1.2/MusimatTutorial/B0116.cpp File Reference

#include "MusimatTutorial.h"

Go to the source code of this file.

Functions
	MusimatTutorialSection (B0116)

---

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;
        
}