slogo.instruction

Class EqualBool

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.EqualBool

public class EqualBool
extends Instruction

A REMAINDER instruction has two components: two GrammarElements that represents the two numbers to perform subtraction on. To evaluate a REMAINDER instruction the expressions are evaluated first, this determines the double version of the numbers. The remainder after dividing the first number by the second number is returned

The value returned by evaluating a REMAINDER instruction is the instruction itself, followed by the two expressions

Field Summary

Fields

Modifier and Type	Field and Description
private GrammarElement	expressionOne
private GrammarElement	expressionTwo

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
EqualBool(GrammarElement e, GrammarElement f) Constructs an EQUALBOOL instruction that can be executed.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Context c) Evaluate this instruction in a Context.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

expressionOne

private GrammarElement expressionOne

expressionTwo

private GrammarElement expressionTwo

Constructor Detail

EqualBool

public EqualBool(GrammarElement e,
                 GrammarElement f)

Constructs an EQUALBOOL instruction that can be executed.

Parameters:

e - the first number

f - the second number

Method Detail

evaluate

public java.lang.Object evaluate(Context c)

Evaluate this instruction in a Context.

Specified by:

evaluate in class Instruction

Parameters:

c - the Context for the evaluation

Returns:

0 or 1, depending on the values of the the expressions

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a String representing this instruction as EQUALBOOL, followed by the two expressions