Coding With Joseph

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C++ Quiz #35

Rule of Three Violation

mediumRule of Three

This class manages dynamic memory. Which rule does it violate and what could go wrong?

📄 Code

1#include <iostream>
2using namespace std;
3 
4class Matrix {
5public:
6    double* elements;
7    int rows, cols;
8 
9    Matrix(int r, int c) : rows(r), cols(c) {
10        elements = new double[rows * cols]();
11    }
12 
13    ~Matrix() {
14        delete[] elements;
15    }
16    // No copy constructor or assignment operator defined
17};
18 
19void printFirst(Matrix m) {  // pass by value
20    cout << m.elements[0] << endl;
21}