I'm currently having trouble with part of Chapter 6 of "Programming: Principles and Practice Using C++" (2nd ed, 3rd printing).
According to the book's index, an example of a member initializer list is on page 184.
Part of page 184 reads as follows:
Here, we'll just provide two member functions to give us a more convenient way of initializing Tokens:
class Token { public: char kind; // what kind of token double value; // for numbers: a value };
We can now initialize ("construct") Token objects. For example:
Token t1 {'+'}; // initialize t1 so that t1.kind = '+' Token t2 {'8,' 11.5}; // initialize t2 so that t2.kind = '8' and t2.value = 11.5
Is one of these sets of code an example of a member initializer list as the index would indicate? I'm somewhat confused because, based on another Stackoverflow answer (What is this weird colon-member (" : ") syntax in the constructor? ), I thought a member initializer list would look something more like:
Name_value(string n, int v)
:name(n), value(v) { }
(found within the following code by Chrinkus on Github: https://github.com/Chrinkus/stroustrup-ppp/blob/master/chapter06/ex04_Name_value.cpp )
class Name_value {
public:
string name;
int value;
Name_value(string n, int v)
:name(n), value(v) { }
};
I think it's far more likely that I'm mistaken than that there is a typo on the book, but nonetheless, I'm finding this part of the book confusing. I appreciate any feedback you may be able to offer.
Please login or Register to submit your answer