Thread: Changing from positive to negative numbers

Hi,

I'm having some trouble trying to convert integer values from positive to negative and vice versa.

Here's an example of what I mean:
= 10 convert to -10
= -10 conver to 10


Here's my code:

Code:

#include "Number.h"

#include <iostream>
using std::cout;

int main()
{
	Number num;

	num.setNum(7);

	cout << "Number: is " << num.getNum() << "\n";

	return 0;
}

Code:

#ifndef NUMBER_H
#define NUMBER_H

class Number
{
public:
	Number();
	void setNum(const int &n);
	int getNum();
	int negation(int value);
private:
	int num;
};

#endif

Code:

#include "Number.h"


Number::Number()
{
	this->num = num;
}

void Number::setNum(const int &n)
{
	this->num = negation(n);
}

int Number::getNum()
{
	return num;
}

int Number::negation(int value)
{
	if(value < 0)
	{
		value  > value;
	}

	if(value > 0)
	{
		value < value;
	}

	return value;
}