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Num.cc
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Num.cc
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/*
Num.cc A number representation in the expression calculator.
Copyright (C) 2008-14 Sakis Kasampalis <s.kasampalis@zoho.com>
(this file is part of the expression calculator).
The expression calculator is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
The expression calculator is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the expression calculator. If not, see
<http://www.gnu.org/licenses/>.
*/
#include <iostream>
#include <string>
#include <sstream>
#include "Num.h"
using std::string;
using std::stringstream;
/**
* Evaluate the value of the
* numeric expression.
*
* @return the value of the
* numeric expression.
*/
double Num::eval() const
{
return value;
}
/**
* Default initialisation
* of a numeric expression.
*/
Num::Num(): value(0) {}
/**
* Initialisation of a numeric
* expression as given by the user.
*
* @param n the value of the numeric
* expression
*/
Num::Num(double n): value(n) {}
/**
* A string representation
* of a numeric expression.
*
* @return a <i>string</i>
* instance of a numeric
* expression.
*/
string Num::toString() const
{
stringstream str;
str << value;
return str.str();
}
/**
* A string representation
* of the expression's operator.
*
* @return a <i>string</i>
* instance of the expression's
* operator.
*/
string Num::strOperator() const
{
return "";
}