Can someone help me overload operators?
Mar 25, 2017 at 10:21pm UTC
Hi guys, I am supposed to create a program that can add, subtract, and multiply polynomials with constants or other polynomials. I need help overloading my arithmetic operators as well as my
<<
and
>>
operators. If someone could also take a look at what I have so far and make sure that it looks good and makes sense, that would be really helpful. I'm still pretty new so I might need the vocab to be simplified haha. My original thought process is that I could use the dynamic array where the size and index number of the array will be the degrees so
a[2]
would be X^2 and and
a[0]
refers to a constant, then the actual value stored at that index place would be the coefficient of the x term. Here is what my class structure looks like, as well as the functions that I have already attempted to code.
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class polynomial
{
public :
polynomial(int degree_Size, int coefficient[]);
polynomial();//sets degreeSize to 10
polynomial(const polynomial& polynomailObject);//copy constructor
void input(polynomial newNumber);
polynomial& operator = (const polynomial& rightSide);
~polynomial();
friend const polynomial operator +(const polynomial& number1, const polynomial& number2);
friend const polynomial operator -(const polynomial& number1, const polynomial& number2);
friend const polynomial operator *(const polynomial& number1, const polynomial& number2);
friend istream& operator >> (istream& inputStream, polynomial newNumber);
friend ostream& operator <<(ostream& outputStream, const polynomial& number);
int getDegreeSize()const { return degreeSize; }
private :
int degreeSize;
int *privateCoefficient;
};
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polynomial::polynomial(int degree_Size, int coefficient[])
{
degreeSize = degree_Size;
privateCoefficient = new int [degreeSize];
for (int i = 0; i <= degreeSize; i++)
{
privateCoefficient[i] = coefficient[i];
}
}
polynomial::polynomial()
{
degreeSize = 10;
privateCoefficient = new int [degreeSize];
}
polynomial::~polynomial()
{
if (privateCoefficient)
{
delete [] privateCoefficient;
privateCoefficient = NULL;
}
}
polynomial::polynomial(const polynomial& polynomialObject) :degreeSize(polynomialObject.getDegreeSize())
{
privateCoefficient = new int [degreeSize];
for (int i = 0; i < degreeSize; i++)
{
privateCoefficient[i] = polynomialObject.privateCoefficient[i];
}
}
polynomial& polynomial::operator = (const polynomial& rightSide) {
if (this == &rightSide)
{
return *this ;
}
else
{
degreeSize = rightSide.degreeSize;
delete [] privateCoefficient;
privateCoefficient = new int [degreeSize];
for (int i = 0; i <= degreeSize; i++)
{
privateCoefficient[i] = rightSide.privateCoefficient[i];
}
return *this ;
}
}
istream& operator >> (istream& inputStream, polynomial& newNumber)
{
int degreeSize;
int *privateCoefficient;
polynomial firstPoly;
cout << "Please enter the highest degree of your polynomial: X^" ;
inputStream >> degreeSize;
privateCoefficient = new int [degreeSize];
for (int i = 0; i <= degreeSize; i++)
{
cout << "Please enter the coefficient for term X^" << i << endl;
inputStream >> privateCoefficient[i];
}
firstPoly = polynomial(degreeSize, privateCoefficient);
return inputStream;
}
Last edited on Mar 25, 2017 at 10:22pm UTC
Mar 28, 2017 at 6:50pm UTC
"Friend" is not needed for operators.
You need to make the return value an address.
In your class definition:
const polynomial& operator +(const polynomial& number1, const polynomial& number2);
In you other file:
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const polynomial& polynomial::operator +(const polynomial& number1, const polynomial& number2)
{
//make number3 = number1+number2
//return number3
}
The others are similar.
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