See the code in http://cpp.sh/8bsdl:
// copy constructor: deep copy
#include <iostream>
#include <string>
using namespace std;
class Example5 {
string* ptr;
public:
Example5 (const string& str) : ptr(new string(str)) {cout << "constructor" << '\n';}
~Example5 () {delete ptr;}
// copy constructor:
Example5 (const Example5& x) : ptr(new string(x.content())) {cout << "copy constructor" << '\n';}
// access content:
const string& content() const {return *ptr;}
};
int main () {
// cout << "copy constructor" << '\n';
Example5 foo ("Example1");
Example5 baz ("Example2");
Example5 bar = foo; // default copy constructor
bar = baz; // default copy assignment
cout << "bar's content: " << bar.content() << '\n';
return 0;
}
I defined a customized copy constructor, but it seems that it never gets called (In fact, the program doesn't produce any output, not even from the constructor...).
The same thing happens when I commented out line 12 where I hope to invoke the default copy constructor. Can anyone tell me what's wrong here?
