ur opinions and development

Hamza Abuzahra (7)
I want to know how to declare the = operator ... And i want to ask y the default constructor does not working

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#include <iostream>
#include <cmath>
using namespace std ;


	class Vector
	{
	private :		int n ;
					double sum ;
					int *V;
	public :
	 
					Vector () {n=1;
							V=new int[n];
								}
					Vector (int a);
					int get_n ();
					double get_length();
					void read_vector ();
					void print_vector ();
					~Vector ()
						{cout<<"You Are InSide The Distructor"<<endl;}
					Vector operator + (Vector V2);
					Vector operator - (Vector V2);
					Vector operator * (Vector V2);
					//Vector operator = (Vector V );

	};
					Vector::Vector(int a)
					{
						n=a;
					
						V=new int[n];
						
					}
						
					int Vector :: get_n()
					{
						return n ;
					}

					void Vector :: read_vector ()
					{

						if (n==1){
							cout<<"Plz fill the vector of size "<< n <<endl ;
							cin>>V[0];

						}
						else {
						cout<<"Plz fill the vector of size "<< n <<endl ;
						for(int i=0;i<n;i++)
							
							cin>>V[i];
						}
					}

					void Vector :: print_vector ()
					{
						cout << " Your Vector Is : " << endl ; 
						for(int i=0;i<n;i++)
							cout<<endl<<"V["<<i<<"] is : "<< V[i] <<endl;
					}
					double Vector :: get_length()
					{
						int par;
						sum=0;
						for (int i=0 ;i<n;i++)
							{
								par=V[i]*V[i];
								
								sum+=par;
							}
						return (sqrt(sum));
					}
											
					Vector Vector :: operator + (Vector V2)
					{
						Vector tmp(V2.n);
					 
						if (n==V2.n)
						{

						
						
						for (int i=0 ; i<n ; i++)
							tmp.V[i]= V[i]+ V2.V[i];
						
						}
						else 
						{
							cout<<"error size";
							return 0 ;
						}
							return tmp ;  

					}
					
					Vector Vector :: operator - (Vector V2)
					{
						Vector tmp(V2.n) ;
						if (n==V2.n)
						{

						
						
						for (int i=0 ; i<n ; i++)
							tmp.V[i]= V[i]- V2.V[i];
						}
						
						
						else {
							cout<<"error size";
							return 0;
						}
						return tmp ;  
					}

				
					Vector Vector :: operator * (Vector V2)
					{
						Vector tmp(V2.n) ;
						if (n==V2.n)
						{
						for (int i=0 ; i<n ; i++)
							tmp.V[i]= V[i] * V2.V[i];
						 
						}
						else 
						{
							cout<<"error size";
							return 0 ; 
						}
						return tmp ; 
					}

					/*Vector Vector :: operator = (Vector V1 )
					{
						if (n==V1.n)
						{

						Vector tmp(V1.n) ;
						
						for (int i=0 ; i<n ; i++)
							tmp.V[i]= V1.V[i] ;
						return tmp ;  
						}
						else 
							cout<<"error size";
					}*/


					int main () 
					{
						double length1 ;

						Vector V1(5) , V2(5) , V3(5), V4(5), V5(5) ;
							V1.read_vector();
							V2.read_vector();
						V3=V1+V2;
							V3.print_vector () ;
							length1 = V1.get_length();
						cout << " The Length For V1 Is : " << length1 << endl;
						V4=V1-V2;
							V4.print_vector();
						V5=V1*V2;
							V5.print_vector();
						return 0 ;
					}
Computergeek01 (5613)
I don't see anything in your main() function that tests the default constructor. How do you know that it is not working?
Hamza Abuzahra (7)
I Delete it because it is not working
just define V6() and V7() and V8()
and make V8=V6+V7

it will make errors
Computergeek01 (5613)
I'm actually not getting any errors when I run this. Something seems strange with your math but I haven't looked into it that far yet.
Hamza Abuzahra (7)
is it good and work properly ?
Computergeek01 (5613)
I'm not sure how to answer that, obviously adding together uninitialized data and outputting it to the screen has undefined results. But I can say that it works as well as I expect it to.
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