initialization - Read For Learn

C++ float array initialization

You only initialize the first N positions to the values in braces and all others are initialized to 0. In this case, N is the number of arguments you passed to the initialization list, i.e.,

Initializing 2D char array in C

I think pictures help. Here is char newarray[5][10]. It is a single memory block consisting of an array of 10 characters, and an array of five of those. You could just clear it with a single memset call. Here is char **array. It says array is a pointer. What is it a pointer to? a pointer to a character. Keep in … Read more

Constructor for structs in C

In C I typically create a function in the style of a constructor which does this. For example (error checking omitted for brevity)

Initializing pointers in C++

Yes, you can initialize pointers to a value on declaration, however you can’t do: & is the address of operator and you can’t apply that to a constant (although if you could, that would be interesting). Try using another variable: or type-casting:

Getting a bunch of crosses initialization error

The C++ standard says: It is possible to transfer into a block, but not in a way that bypasses declarations with initialization. A program that jumps from a point where a local variable with automatic storage duration is not in scope to a point where it is in scope is ill-formed unless the variable has … Read more

too many initializers for ‘int [0]’ c++

In C++11, in-class member initializers are allowed, but basically act the same as initializing in a member initialization list. Therefore, the size of the array must be explicitly stated. Stroustrup has a short explanation on his website here. The error message means that you are providing too many items for an array of length 0, … Read more

What is an method in Java? Can it be overridden?

Have a look at the Java Virtual Machine Specification, chapter 2.9. It say on the <init> name: At the level of the Java Virtual Machine, every constructor written in the Java programming language (JLS §8.8) appears as an instance initialization method that has the special name <init>. This name is supplied by a compiler. Because … Read more

C char array initialization

This is not how you initialize an array, but for: The first declaration: char buf[10] = “”; is equivalent to char buf[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; The second declaration: char buf[10] = ” “; is equivalent to char buf[10] = {‘ ‘, 0, 0, 0, 0, 0, 0, … Read more

Static Initialization Blocks

The non-static block: Gets called every time an instance of the class is constructed. The static block only gets called once, when the class itself is initialized, no matter how many objects of that type you create. Example: This prints:

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