Who thought this was a good idea

oh well if they couldn't care to initialize the variable I GUESS WE'LL MAKE IT RANDOM

There is probably a reason for it... somewhere

@Lahsen2016 this example code from SO so no

In standard C a variable definition only gets a pointer to a memory area.

That area is not prepared in any way and can contain anything the area was used for last.

Many other languages of later design explicitly either require a initial value or defaults to initializing with some default to prevent leakage from other apps.

@Voxera That only holds for variables on the stack or the heap. For global/static variables the C-standard defines them to start off with every byte set to 0.

@Embeddeded Ok, did not know that ;)

But I rather be safe and do
My own initializing anyway ;)