How do I initialize an array within a class without using C++11 Features?

Question

How do I initialize an array within a class in c++ without using Initialization Lists (which I think is a c++11 feature)? My compiler (VS2013) does not support c++ 11 to its full extent, sadly.

Answer 1

Visual Studio 2013 supports Initializer lists, this means you can easily do :

--C++11: default initialization using {}
int n{};      --zero initialization: n is initialized to 0
int *p{};     --initialized to nullptr
double d{};   --initialized to 0.0
char s[12]{}; --all 12 chars are initialized to '\0'
string s{};   --same as: string s;
char *p=new char [5]{}; 
vector<int> vi {1,2,3,4,5,6};
vector<double> vd {0.5, 1.33, 2.66}; 
etc

Or other forms which are supported in C++11.
if you are not fond of it you can also use the older methods such as :

You can simply do as follows:

int bar [5] = { 10, 20, 30 };

Which creates an array like this:

---------------------------------
|  10  |  20  |  30  |  0  |  0  |
---------------------------------

You can also have :

int baz [5] = { }; 

which translates to :

-------------------------------
|  0  |  0  |  0  |  0  |  0  |
-------------------------------

or you might have :

int foo [] = { 16, 2, 77, 40, 12 };

which translates to :

----------------------------------
|  16  |  2  |  77  |  40  |  12  |
----------------------------------

If you are dealing with classes and their objects you can simply call your constructor like this:

Point aPoint[3] = {
   Point( 3, 3 ),
   Point( 13, 6 ),
   Point( 32, 98 )
};

All the former rules apply to this form as well. If you declare an static array, they will be initialized based on their types default (e.g int defaults to 0 and etc)