compiling a program and getting an undifined reference to the destructor

[Bopaki]

Write your question here.
When I include the destructor I get a warning that says:
92 16 C:\Martin\Zola\dayType.cpp [Warning] deleting array '((dayType*)this)->dayType::days' [enabled by default]

  Put the code you need help with here.
 #ifndef DAY_TYPE_H
    #define DAY_TYPE_H
    #include <iostream>
    #include <string>
    #include <iomanip>
    using namespace std;
    /******* Class dayType Specification ********/
    class dayType
    {
    	
    	private:
    		string days[7];
    		string currentDay;
    		int numDays;
    	public:
    		void setDay(string newDay);
    		void printDay() const;
    		int showDay(int& day);
    		int nextDay(int day);
    		int prevDay(int day) const;
    		int calcDay(int day, int numDays);
    				
    		dayType()
    		{
    			days[0] = "Sunday";
    			days[1] = "Monday";
    			days[2] = "Tuesday";
    			days[3] = "Wednesday";
    			days[4] = "Thursday";
    			days[5] = "Friday";
    			days[6] = "Saturday";
    			currentDay = days[0];
    			numDays = 0;
    		};
    	~dayType();
    	
    };
    #endif
#include "dayType.h"
    void dayType::setDay(string newDay)
    {
       currentDay = newDay;
    }
    void dayType::printDay() const
    {
       cout << "Day chosen is " << currentDay << endl;
    }
    int dayType::showDay(int& day)
    {
       return day;
    }
    int dayType::nextDay(int day)
    {
    	day = day++;
    	if (day > 6)
    		day = day % 7;
    	switch (day)
    	{
    	case 0: cout << "The next day is Sunday";
    		break;
    	case 1: cout << "The next day is Monday";
    		break;
    	case 2: cout << "The next day is Tuesday";
    		break;
    	case 3: cout << "The next day is Wednesday";
    		break;
    	case 4: cout << "The next day is Thursday";
    		break;
    	case 5: cout << "The next day is Friday";
    		break;
    	case 6: cout << "The next day is Saturday";
    		break;
    	}
    	cout << endl;
    	return day;
    }
    	
    int dayType::prevDay(int day) const
    {
    	day = day--;
    	switch (day)
    	{
    	case -1: cout << "The previous day is Saturday.";
    		break;
    	case 0: cout << "The previous day is Saturday.";
    		break;
    	case 1: cout << "The previous day is Saturday.";
    		break;
    	case 2: cout << "The previous day is Saturday.";
    		break;
    	case 3: cout << "The previous day is Saturday.";
    		break;
    	case 4: cout << "The previous day is Saturday.";
    		break;
    	case 5: cout << "The previous day is Saturday.";
    		break;
    	default: cout << "The previous day is Saturday.";
    	}
    	cout << endl;
    	return day;
    }
    int dayType::calcDay(int addDays, int numDays)
    {
    	addDays = addDays + numDays;
    	if (addDays > 6)
    		addDays = addDays % 7;
    	switch(addDays)
    	{
    	case 0: cout << "The calculated day is Sunday.";
    		break;
    	case 1: cout << "The calculated day is Monday.";
    		break;
    	case 2: cout << "The calculated day is Tuesday.";
    		break;
    	case 3: cout << "The calculated day is Wednesday.";
    		break;
    	case 4: cout << "The calculated day is Thursday.";
    		break;
    	case 5: cout << "The calculated day is Friday.";
    		break;
    	case 6: cout << "The calculated day is Saturday.";
    		break;
    	default: cout << "Not valid choice.";
    	}
    	cout << endl;
    	return addDays;
    }
    dayType::~dayType()
    {
    	delete [] days;
	}
#include <iostream>  
    #include <string>  
    #include "dayType.h"    
    using namespace std;  
    void showSelections();
    int main()  
    {  
    	dayType userDay;
    	int currentDay; 
    	int addDays;
    	int test;
    	string day;
    	
    	do
    	{
    		test = 0;
    		showSelections();
    		cin >> currentDay;
    		cout << endl;
    		if (currentDay = 0)
    		{
    			userDay.setDay("Sunday");
    		}
    		else if (currentDay = 1)
    		{
    			userDay.setDay("Monday");
    		}
    		else if (currentDay = 2)
    		{
    			userDay.setDay("Tuesday");
    		}
    		else if (currentDay = 3)
    		{
    			userDay.setDay("Wednesday");
    		}
    		else if (currentDay = 4)
    		{
    			userDay.setDay("Thursday");
    		}
    		else if (currentDay = 5)
    		{
    			userDay.setDay("Friday");
    		}
    		else if (currentDay = 6)
    		{
    			userDay.setDay("Saturday");
    		}
    		else if (currentDay = 9)
    		{
    			cout << "Exiting...";
    			return 0;
    		}
    		else
    		{
    			cout << "Not a valid choice." << endl;
    			test = -37;
    		}
    	}
    	
    	while (test < 0);
    	userDay.printDay();
    	cout << endl;
    	userDay.showDay(currentDay);
    	cout << endl;
    	userDay.nextDay(currentDay);
    	cout << endl;
    	userDay.prevDay(currentDay);
    	cout << endl;
    	cout << "Enter the number of days to add: " << endl;
    	cin >> addDays;
    	cout << endl;
    	userDay.calcDay(currentDay, addDays);
    	cout << endl;
    	cout << endl << endl;
    	system("pause");
    	return 0;
    }
    	
    // Function to display weekday selections.
    void showSelections()
    {
    	cout << "*****Please enter a day of the week*****" << endl;
    	cout << "0 for Sunday" << endl;
    	cout << "1 for Monday" << endl;
    	cout << "2 for Tuesday" << endl;
    	cout << "3 for Wednesday" << endl;
    	cout << "4 for Thursday" << endl;
    	cout << "5 for Friday" << endl;
    	cout << "6 for Saturday" << endl;
    	cout << "9 to exit" << endl;
    }

[Thomas1965]

Why do you want to delete days ? It's a static variable.

[MaBunny]

In line 131:
delete [] days;

You are deleteing a array of string which is not a pointer.
the new and delete keywords are used on a pointer.

You can leave the dtor as it is (i mean empty),the compiler will do the job for you when its called by the program.

[Bopaki]

Thank you all. I commented out the destructor and the program worked fine.