How does aCC compiler react to object creation

[bmsce]

I need to know what exactly the aCC compiler or any other compiler does when it encounters an object creation as in line # 9 :

1    class A
2    { 
3       int i;
4       public:
5        A(){ i=0;}
6     };
7   int main()
8   { 
9    A a1;
10  return 0;
11  }
 

To be more clear, I would like to know the series of actions the COMPILER does to execute line # 9. Does it embed the code of the constructor since constructor is inline?

[weaknessforcats]

Yes, it does. It has to. Otherwise, there would be multuple constructor functions created every time you included your header somewhere else.

Why is the constructor inline?? C++ is not Java. By exposing your constructor definition, the users have to recompile and relink should you change it. By keeping the definition in another soruce file, the users need only relink.

[bmsce]

Yes, it does. It has to. Otherwise, there would be multuple constructor functions created every time you included your header somewhere else.

Why is the constructor inline?? C++ is not Java. By exposing your constructor definition, the users have to recompile and relink should you change it. By keeping the definition in another soruce file, the users need only relink.

Thanks for your response weaknessforcats. But my worry is about the things the compiler does when it has to execute line # 9. Here are few queries. Pl answer them:
1) Does compiler allocate memory for that object a1 and initialize it? OR
2) Does it only put the object a1 in its symbol table without initializing it?

I am little curious to know as to what are the things that happen during compilation in line # 9.

[weaknessforcats]

The steps are:

1) memory for the object is allocated
2) the constructors for each data member are called
3) the contructor for the object itself is called

Please note that if members of A are class objects, then their constructors are called and if and of those members have class members then those constructors are called also ad infinitum until you arrive at a class with nothing but built-in types for data members.

[bmsce]

The steps are:

1) memory for the object is allocated
2) the constructors for each data member are called
3) the contructor for the object itself is called

Please note that if members of A are class objects, then their constructors are called and if and of those members have class members then those constructors are called also ad infinitum until you arrive at a class with nothing but built-in types for data members.

I got it!! Thanks a ton.