Variable types with * prefix

[GolamMostafa]

@J-M-L

In C++, a declaration introduces a name and its type to the compiler without necessarily allocating storage. A definition allocates storage for a variable or provides the implementation for a function or class, and thus is also by nature a declaration. Initialization gives an object its first value at the point of definition, while assignment changes the value of an already existing object later.

That means:

int y;      //it is a declaration; no memory space is allocated
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int y;
y = 0x35;      //variable y is defined; memory space is allocated
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int y = 0x35; //variable y is initialized; given a value to y for the first time
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y = 0x76; //variable y is assigned a new value