hi in my text book i have this problem.
how to program this

Define a class Quadratic_int that stores the coefficients of a quadratic polynomial in a dynamically allocated array of integers. Supply the "big three" memory management functions. Use this class to demonstrate 
(a) the difference between initialization 
        Quadratic_int s; 
        Quadratic_int t = s; 
and assignment operation
        Quadratic_int s; 
        Quadratic_int t; 
        s = t; 
(b) the fact that all constructed objects are automatically destroyed 
(c) the fact that the copy constructor is invoked if an object is passed by value to a function 
(d) the fact that the copy constructor is not invoked when a parameter is passed by reference 
(e) the fact that the copy constructor is used to copy a return value to the caller. 
Supply a member function which calculates the value of a quadratic function for a given argument value. Overload + and - operators for addition and subtraction of two polynomials and the unary operator * which return true or false when the corresponding quadratic equation has or has not real roots. Overload the stream operators << and >>. Demonstrate all these functions and operators.

thnx for help

Now, Where's your code? Haven't you tried solving this problem yourself? Post your progress if you've attempted this.. Else, have a go @ it, then come back if u have any problems....

When is the assignment due, that is, how much time do you have before you have to turn it in? Have you studied c++ classes and arrays yet?

Edited 5 Years Ago by Ancient Dragon: n/a

Since you are reading the book, I assume you have some knowledge, so here is a basic start

class Quadratic_int{
private:
 int *coefficients;
public:
 Quadratic_int(); //default constructor 
 Quadratic_int(const Quadratic_int&) ; //copy constructor[ one of big 3 ]
 ~Quadratic_int(); //destructor[ two of big 3 ]
 Quadratic_int& operator=(const Quadratic_int&); // assignment operator[ three of big 3 ]
 //..possibly more function for quadratic class
};

Now you need to define the skeleton above. THink about it and start coding. If your stuck, then you aren't thinking, reading, and researching enough.

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