Feeling unlucky? Want to find out if you're having good or bad luck today? For the low price of free and a potential segfault luckcalc can provide!
Simple and easy:
git clone https://github.com/TorchedSammy/luckcalc
cd luckcalc
make
And run with luckcalc.exe (Or ./luckcalc on *nix)
undefined behaviour
What??
This program defines 2 uninitialized variables (bad_luck and good_luck) and reads them to figure out your luck. (I personally haven't gotten bad luck yet lmaoooooo)
Uninitialized variables may not always be what you expect in a local scope. They can be (say for us with an int type) 69, 6467 or whatever.
As this stackoverflow answer says (edited for C++):
Static variables (file scope and function static) are initialized to zero:
int x; // zero
int y = 0; // also zero
void main() {
static int x; // also zero
std::cout << x;
}Non-static variables (local variables) are indeterminate. Reading them prior to assigning a value results in undefined behavior.
void main() {
int x;
std::cout << x; // the compiler is free to crash here
}