*(long*)0 = 0

[nguyentrang]

*(long*)0 = 0;

What does this line of code do?

[Disch]

It will likely crash your program.

[helios]

It interprets address 0 as a pointer to a long and assigns zero to the long stored there. 0 is by definition an invalid pointer, so, as Disch said, the program is very likely to crash if you try to do that.

[m4ster r0shi]

That is unless you are Chuck Norris, because, as we all know,
Chuck Norris can dereference both null and void pointers.

[firix]

the program has crashed.If you do not, of course you something different.