Is it good idea to pass uninitialized variable to srand?

Question

Is it good idea to pass uninitialized variable to srand instead of result of time(NULL)?
It is one #include and one function call

Answer 1

It's not a good idea. Undefined behaviour doesn't guarantee that you won't get the same seed on every run, which would be bad for randomness. It doesn't guarantee that your processor won't halt and catch fire either.