Coding With Joseph

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C++ Quiz #33

Missing Assignment Operator

mediumRule of Three

This class has a destructor and copy constructor, but the code still crashes. What is missing?

📄 Code

1#include <iostream>
2#include <cstring>
3using namespace std;
4 
5class MyString {
6public:
7    char* str;
8    MyString(const char* s) {
9        str = new char[strlen(s) + 1];
10        strcpy(str, s);
11    }
12    MyString(const MyString& other) {
13        str = new char[strlen(other.str) + 1];
14        strcpy(str, other.str);
15    }
16    ~MyString() { delete[] str; }
17};
18 
19int main() {
20    MyString a("hello");
21    MyString b("world");
22    b = a;  // assignment, not copy construction
23    return 0;
24}