Pointer Problems

[stardust2552]

My test runs but I don't think I am using my pointers right but after days of trying to figure it out I need new eyes to see where I am going wrong. I have a random number generator that creates resistor values and then stores them in an array, but when I go to sort them the values are not the same as the first time.... Please help

#include <iostream>
#include <windows.h>
#include <time.h>
#include <stdlib.h>
#include<stdio.h>
using std:: cout;
using std:: cin;
using std::endl;

using namespace std;

enum pResistors {R_nominalValue,R_One,R_Two,R_Three};

class Resistor
{
public:
	static int ResCount;

	Resistor(void);//constructor
	Resistor(double);
	void setNominalResistance(double);
	double getNominalResistance();
	void SortObj(Resistor **);
	void displayMenu(void);
	char getMenuSelection(void);
	~Resistor(void);//destructor
	double pResistor[4];

private:
	double nominalResistance;
};

Resistor::Resistor(void) //constructor
{
}

Resistor::Resistor(double nomRes)
{
	pResistor[4];
	nominalResistance = nomRes;
	ResCount = ResCount + 1;
	if(rand()%10000+1000 < 1000 || rand()%10000+1000 > 10000)
	{
		ResCount = ResCount - 1;
	}
}
int Resistor::ResCount = 0;
void Resistor::setNominalResistance(double nomRes)
{
	nominalResistance = nomRes;
}

double Resistor::getNominalResistance()
{
	return nominalResistance;
}


Resistor::~Resistor(void) //destructor
{
}

void displayMenu()
{

	cout << " Enter C  to create a resistor " << endl;
	cout<< endl;

	cout << " Enter S to sort results " << endl;
	cout << endl;
	cout << " Enter Q To quit " << endl;
	cout << endl;
}

char getMenuSelection() //Gets the menu selection
{
	cout << "Enter your choice and press enter:";
	char Choice;
	cin >> Choice;

	switch(Choice)
	{
	case 'c':
	case 'C':
		return Choice;
		break;
	case 's':
	case 'S':
		return Choice;
		break;
	case 'q':
	case 'Q':
		exit(0);
		break;
	default:	//if menu selection is not valid let the user know
		cout << "\nInvalid selection: try again" << endl;
		displayMenu();
		getMenuSelection();
		break;

	}
}

void SortObj(Resistor **R)
{
	int i, j, mark = 1;    // set marker to 1 for the first pass
	Resistor *temp; //pointer to help swap pointers

	for(i = 1; (i <= 4) && mark; i++)
	{
		mark = 0;
		for (j=0; j < (3); j++)
		{
			if (R[j + 1] -> getNominalResistance() < R[j] -> getNominalResistance())
			{
				temp = R[j];
				R[j] = R[j + 1];
				R[j + 1] = temp;
				mark = 1;
			}
		}
	}
	delete temp;

}
void main()
{
	Resistor *pResistor[4];
	 srand(time(0));
	int i = 0;
	char Choice;




	do
	{
		displayMenu(); //displays the intitial menu
		Choice = getMenuSelection(); //gets the menu selection
		if(Choice == 'c' || Choice == 'C')
		{
			if(Resistor::ResCount == 4)
			{
				cout << "you entered the maximum number of 4 resistors." << endl;
			}
			do
			{
				cout << "Your random resistance must be between 1000 and 10000" << endl;
				if(Resistor::ResCount < 4)
				{
					cout  <<"Resitor"<< i + 1 << "   Random Resistance is:"<<endl;
					cout<< rand()%10000+1000;
					cout<<endl;


					pResistor[i] = new Resistor(rand()%10000+1000);
				}
			}
			while(rand()%10000+1000 < 1000 || rand()%10000+1000 > 10000);
			i++;
		}

		else if(Choice == 's' || Choice == 'S')
		{
			if(Resistor::ResCount < 4)
			{
				cout << "You have not used the maximum of 4 resistors" << endl;
			}
			else
				SortObj(&pResistor[0]);
			for(int j = 0; j < Resistor::ResCount; j++)
			{
				cout  << j + 1 << "\n";
				cout << "Nominal Resistance:" << pResistor[j] -> getNominalResistance() << "\n";

			}
		}
	}
	while(Choice != 'q' || Choice != 'Q'); //loop until quit

	delete [] pResistor;
}