C:/Musimathics_local/Musimat/MusimatChapter9/C090703c.cpp File Reference

#include "MusimatChapter9.h"

Go to the source code of this file.

Functions
	MusimatChapter9Section (C090703c)
Static Void	para1 ()
Integer	Random (Integer L, Integer U)
Static Void	para2 ()

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Function Documentation

MusimatChapter9Section

(

C090703c

)

Definition at line 2 of file C090703c.cpp.

References para1(), and para2().

                                 {
Print("*** Random Integer Numbers Scaled to an Arbitrary Range ***");
/*****************************************************************************

Random Integer Numbers Scaled to an Arbitrary Range

*****************************************************************************/
        para1(); // Step into this function to continue.
        para2(); // Step into this function to continue.
}

Static Void para1

(

)

Definition at line 13 of file C090703c.cpp.

                    {
/*****************************************************************************
We can adapt the Random() function to return integers within a specified 
integer range. When a real value is converted to an integer, we truncate 
(discard) the fractional part, leaving the integer part. For example,
*****************************************************************************/

        Print("*** Example of Truncation ***");
        Real r = 3.14159;
        Print("Real r = ", r);
        Integer i = Integer(r);
        Print("Truncated = ", i);

/*****************************************************************************
prints 3. Truncation is equivalent to the floor function.

Below is a method to generate integer random values over an integer range.
*****************************************************************************/
}

Static Void para2

(

)

Definition at line 40 of file C090703c.cpp.

References Random(), and x.

                    {
/*****************************************************************************
Note that I added 1.0 to the upper real boundary. Truncation of the random 
result necessitates slightly increasing the top end of the range of choice. 
For example, in order to choose a value in the integer range 0 to 9, we must 
generate a random real value x that lies in the range 0.0 <= x < 10.0. This 
gives an equal chance of obtaining an integer in the range 0 to 9.

Here are ten values generated by this function over the interval [0,10].
*****************************************************************************/
        Print("*** Example of Random Integer Values in the Interval [0,10] ***");
        IntegerList x;

        For ( Integer i = 0; i < 10; i = i + 1 )
                x[i] = Random( 0, 10 );

        Print( x );

}}

Integer Random	(	Integer	L,
		Integer	U
	)

Definition at line 33 of file C090703c.cpp.

References Random(), and x.

                                     {
        Real rL = L;                                                    // convert L to Real
        Real rU = U + 1.0;                                              // convert U to Real, add 1.0
        Real x = Random(rL, rU);                                // get a real random value
        Return( Integer(x));                                    // return it as an integer
}

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