How many times is the constructor called in the following code

[shanno8]

How many times is the constructor called in the following code? and explain why.

Apple func()
{
Apple w;
Return w;
}

void main()
{
Apple x;
Apple y;
Apple z;
z = func();
}

[Ganado]

0 because the code doesn't compile for me.

Is this just a question on your take-home quiz?

[nuderobmonkey]

That's a matter of how smart the compiler optimizes the code. If the compiler is "dumb", there would be up to 4 constructor callings. A smart compiler would detect that the code does nothing and optimizes all stuff away.

[lastchance]

shanno8 wrote:

How many times is the constructor called in the following code?

Why don't you just try it?

#include <iostream>

class Apple
{
public:
   Apple() { std::cout << "Hello!\n"; }
};

Apple func()
{
   Apple w;
   return w;   // Ahem: "return", not "Return"
}

int main()     // Ahem: "int main()", not "void main()"
{
   Apple x;
   Apple y;
   Apple z;
   z = func();
}