Hello all,

I have created a dynamic matrix class. I overloaded the multiplication operator as follows:

Code:

Matrix Matrix::operator*(const Matrix &another) const //'const' keyword after => doesn't
{ //modify data members
if (col != another.row)
{
cout<<"Error in matrix multiplication. Matrix dimensions do not agree."<<endl;
return *this;
}
Matrix prod(row,another.col);
Complex sum(0,0);
for(int i=0; i<row; i++) //i: 0 to 3
{
sum = 0;
for(int j=0; j<another.col; j++) //j: 0 to 2
{
for(int k=0; k<row; k++)
{
sum = sum + A[k] * another(k,j);
}
//cout<<"prod("<<i<<","<<j<<") = "<<sum<<endl;
prod(i,j) = sum;
}
}
return prod;
}

I wanted to do it in such a way that I could do this:

Code:

Matrix A(5,5), B(5,1);
//define the matrices
cout<<A*B<<endl; //I overloaded the cout operator as well

Just for the record, I created a complex number class, and I have defined a similar function:

Code:

Complex Complex::operator +(const Complex &num) const
{
Complex sum;
sum.real = real + num.real;
sum.imag = imag + num.imag;
return sum;
}

When I do

Code:

Complex a(1,1), b(2,-2);
cout<<a+b<<endl;

The destructor is called AFTER it is displayed. But this does not work for the Matrix class, and I just can't figure out why. I thought I would save you all the trouble of going through all the code by only displaying what is pertinent. If you need all the code, pls let me know. Thanks a million.

Bill