slogo.instruction

Class IsNotEqual

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.IsNotEqual

public class IsNotEqual
extends Instruction

Returns 1 if the two inputs are not equal, 0 otherwise

Field Summary

Fields

Modifier and Type	Field and Description
private ArithmeticBase	numOne
private ArithmeticBase	numTwo

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
IsNotEqual(ArithmeticBase num1, ArithmeticBase num2) Constructs an IsNotEqual Instruction

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Context c) Evaluate this language construct in some context.
java.lang.String	toString() Format NOTEQUAL num1 num2

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

numOne

private ArithmeticBase numOne

numTwo

private ArithmeticBase numTwo

Constructor Detail

IsNotEqual

public IsNotEqual(ArithmeticBase num1,
                  ArithmeticBase num2)

Constructs an IsNotEqual Instruction

Parameters:

num1 - is the first ArithmeticBase in the comparison

num2 - is the second ArithmeticBase in the comparison

Method Detail

toString

public java.lang.String toString()

Format NOTEQUAL num1 num2

Overrides:

toString in class java.lang.Object

evaluate

public java.lang.Object evaluate(Context c)

Description copied from class: GrammarElement

Evaluate this language construct in some context. The evaluation may have side-effects, e.g., moving a turtle.

Specified by:

evaluate in class Instruction

Parameters:

c - is the Context of what we are evaluating

Returns:

0 if the values are equal and 1 if the values are not equal