Answer Posted / kasi

1) Brief details on initialization:

To perform true initialization (not assignments) for a
class data member, C++ provides extened syntax for
constructor function.

Syntax:
class A
{
int ssn;
double sal;
public:
A(int j,double k):sal(k),ssn(j) //initialization
{
//assignement
}
}

Therefore constructor function has 2 parts they are
- initialization
- Assignment
Note - initialization will be excuted first and then
assignment

2) When is the initialization list mandatory?
- If the instance variable is constant
- If the class contains reference variable

3) coming to the posted question: order of member
initialization will be done in 2 ways by the compiler.

A) Declaration order
B) The order of members in the intialization list.

For the above example ssn is initialized first then sal.

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