[C] The lousy random question thread

[kung foo man]

hey, 2nd C question, yee

1)

> but why do i have to write it this way: (int *)&a and not (int)*(&a)?

everything in the () is nothing but a *type*. so (int *) is just representig the type of a int-pointer.

> would be (int*)&a be the same, without the space between int and *?

yep, totally the same

> is the dereferenc-star * assigned to the int-cast or to the adress here?

in the context of a cast (int *) it is *not* dereferencing anything. it just indicates that is *is* a pointer and can be referenced later.

you can derefence references as often as you want and make jokes out of it:

		    int i = 4;
    printf("%d", *&*&*&*&i); // prints 4

    // thats the same:
    printf("%d", *(int *)&*&i); // 4 
	

p = malloc( count * sizeof( int * ) );
size of what? an int-pointer?

yea, the size of a int-pointer. on 32bit = 4 byte, on 64bit = 8byte
p is a pointer-on-a-pointer... when you derefence it once, it is still a pointer, so you need to derefence it twice (**p). it's not needed in that example. ^^

2) you dont need to write any 1.0 or 1.0f

you can just write:

		float delta = 1; 
	

every compiler is smart enough to recognise, what you want.