Good evening,

I have been working with derived classes and what could seem like an easy problem has had me look into it for hours.
My error message:
Square.h(14) : error C2512: 'Rectangle' : no appropriate default constructor available

Everything works well if I don't use my derived class "Square.h" but I soon as I try, then I get that constructor error. IF someone could please help me I would greatly appreciate it :)

Thank you,
John

My code:
The base class:

#pragma once

ref class Rectangle
{
public:
	int m_Left;
	int m_Top;
	int m_Right;
	int m_Bottom;

Rectangle(int lt, int tp, int rt, int bm)
{
m_Left = lt;
m_Top = tp;
m_Right = rt;
m_Bottom = bm;
}

//Defining the property for obtaining the LeftValue
	property int lt	
	{
		int get() 
		{ 
			return m_Left;
		}
		void set(int value) { m_Left = value; }
	}

	//Defining the property for obtaining the TopValue
	property int tp	
	{
		int get() 
		{ 
			return m_Top;
		}
		void set(int value) {m_Top = value;}
	}

//Defining the property for obtaining the RightValue
	property int rt 
	{
		int get()
		{ 
			return m_Right;
		}
		void set(int value) {m_Right = value;}
	}

	//Defining the property for obtaining the BottomValue
	property int bm		
	{
		int get() 
		{ 
			return m_Bottom; 
		}
		void set(int value) {m_Bottom = value;}
	}

};

My derived class:

#pragma once
#include <iostream>                    // For stream I/O
#include <cstring> 
#include "Rectangle.h"

ref class CSquare: Rectangle
{
public:
	int m_Left;
	int	m_Top;
	int m_Right;
    int m_Bottom;
	
CSquare(int lt, int tp, int rt, int bm)
{
 m_Left = lt;
 m_Top = tp;
 m_Right = rt;
 m_Bottom = bm;
}

 //LEft value function
 long LeftValueS()
 {
 return (m_Left);
 }

 //top function value
 long TopValueS()
 {
 return (m_Top);
 }

};

My CPP file:

// TestingSquare.cpp : main project file.
#include <iostream>                   
#include <cstring>                     
#include "stdafx.h"
#include "Rectangle.h"
#include "Square.h"                  

using namespace System;

int main()
{
Rectangle^ Rect1 = gcnew Rectangle(11,22,33,44);

//Rect values displayed
Console::WriteLine("Rect LeftValue:{0}",Rect1->lt);
Console::WriteLine("Rect TopValue:{0}",Rect1->tp);
Console::WriteLine("Rect RightValue:{0}",Rect1->rt);
Console::WriteLine("Rect BottomValue:{0}",Rect1->bm);


 //Square values displayed
 /*CSquare Square(5,5,5,5);
 Console::WriteLine("Square Left value:{0}",Square.LeftValueS());
 Console::WriteLine("Square top value:{0}",Square.TopValueS());*/

return 0;
}

You need to add a constructor to Rectangle that takes no parameters -- that's called the default constructor.

Thank you so much, it's a one liner
Rectangle() {}
and I am good to continue on.

Thanks again for such a quick response,

John

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