Ray Devore wrote:
>
> > > Samp obj = Samp(12,22) // Explicit Call
> Calls constructor (not copy constructor) for
> Samp(12,22) and creates a temp object, then calls copy
> constructor to create and initialize obj with the temp
> object, then calls the destructor to delete the temp
> object so you get two additional function calls with
> the second method.
I wrote a sample program to check if the copy constructor would be
called for the above statement. But no copy constructor gets called.
So I think there is no difference between the following two statements.
Type obj(p);
Type obj = p;
Here is the sample program.
(begin-code)
#include <iostream>
#include <string>
using namespace std;
class T
{
public:
T(const string& n): name(n) {
cout << "ctor: " << name << endl;
}
T(const T& that) {
name = that.name;
cout << "copy ctor: " << name << endl;
}
~T() {
cout << "dtor: " << name << endl;
}
private:
string name;
};
int main()
{
T x("1");
T y = T("2");
}
(end-code)
--
Always acknowledge a fault. This will throw those in authority off
their guard and give you an opportunity to commit more. - Mark Twain
