Class Calculator

java.lang.Object

calculator.Calculator

public class Calculator
extends Object

This class represents the core logic of a Calculator. It can be used to print and evaluate artihmetic expressions.

Author:

tommens

Constructor Summary

Constructors

Constructor	Description
Calculator()	Default constructor of the class.

Method Summary

Modifier and Type	Method	Description
Atom	eval(Expression e)	Evaluates an arithmetic expression and returns its result
String	format(Expression e, Notation notation)	Formats an arithmetic expression in a given notation
void	print(Expression e)	Prints an arithmetic expression provided as input parameter.
void	printExpressionDetails(Expression e)	Prints verbose details of an arithmetic expression provided as input parameter.

Methods inherited from class Object

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

Constructor Details

Calculator

public Calculator()

Default constructor of the class. Does nothing since the class does not have any variables that need to be initialised.

Method Details

print

public void print(Expression e)

Prints an arithmetic expression provided as input parameter.

Parameters:

e - the arithmetic Expression to be printed

See Also:

• printExpressionDetails(Expression)

printExpressionDetails

public void printExpressionDetails(Expression e)

Prints verbose details of an arithmetic expression provided as input parameter.

Parameters:

e - the arithmetic Expression to be printed

See Also:

• print(Expression)

eval

public Atom eval(Expression e)

Evaluates an arithmetic expression and returns its result

Parameters:

e - the arithmetic Expression to be evaluated

Returns:

The result of the evaluation

format

public String format(Expression e,
 Notation notation)

Formats an arithmetic expression in a given notation

Parameters:

e - the arithmetic Expression to be formatted

notation - the notation to be used for formatting

Returns:

The formatted expression as a String