typedef

typedef

this is probably a stupuid question, but i never understood typedef. if i have something like this

Code:

typedef a *b;

would that be the same as

Code:

a * b;

whats the difference?

typedef - Wikipedia, the free encyclopedia

Should be clear after reading that :3

typedef changes the name of something.

typedef int INTEGER;
makes int INTEGER, so a dec for int would be
INTEGER variable = 9001;

though as far as i know it is only to keep consistency for MultiPlatform APIs and making lives easier so we do not need to write stuff like unsigned long every time.

typedef double dub;
dub DoubleVariable = 9001;

typedef unsigned long ULONG;
ULONG prettyLargeNumber = 9001;

same with pointer to stuff names

example
typedef char* pointer_to_a_character;
pointer_to_a_character String = "Hello";
cout << String;

Function pointers as well, this way you only have to type it out once.

Code:

int Add(int x,int y)
{
         return x+y;
}

typedef int (__cdecl* pAdd)(int,int); //__cdecl is C's usual calling convention
pAdd funcAdd = &Add

int main()
{
       int number = funcAdd(5,5); //this is actually pointing to Add()
       cout << number;   //output is 10
}

Just adding to Virtual Void's comment.

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