hi im trying to make a matrix class which makes use of operator overloading. Ive followed several tutorials, and the one which looked best implemented the binary operators (+ - etc) using unary operators (+=) as such.

the problem is in these examples result is created on the stack (i assume) and i get warning messages whenever i compile. the obvious solution would be to return a Matrix on the heap and write another constructor which accepts a Matrix pointer assign it to itself using the = operator, but this seems messy. whats the standard approach to this problemCode:#include "Matrix.h" Matrix::Matrix(int m, int n, float* values) { nn = n; mm = m; matrix = new float[mm*nn]; for(int mi = 0; mi < mm; mi++) { for(int ni = 0; ni < nn; ni++) { matrix[mi*nn+ni] = values[mi*nn+ni]; } } } Matrix::Matrix() { nn = 1; mm = 1; matrix = new float[1]; matrix[0] = 0; } Matrix& Matrix::operator=(const Matrix &m2) { if(&m2 != this) { nn = m2.nn; mm = m2.mm; delete[] matrix; matrix = new float[mm*nn]; for(int mi = 0; mi < mm; mi++) { for(int ni = 0; ni < nn; ni++) { matrix[mi*nn+ni] = m2.matrix[mi*nn + ni]; } } } return *this; } const Matrix& Matrix::operator+=(const Matrix &m2) { for(int mi = 0; mi < mm; mi++) { for(int ni = 0; ni < nn; ni++) { matrix[mi*nn+ni] += m2.matrix[mi*nn + ni]; } } wxString output; output.Printf(_T("%f %f\n%f %f"), matrix[0], matrix[1], matrix[2], matrix[3]); wxMessageBox(output); return *this; } const Matrix& Matrix::operator+(const Matrix &m2) { Matrix result = *this; result += m2; return result; }

thx