Why I don't get segmentation fault when using argc and argv?

Question

I have an OpenGL program with my main with 2 parameters I am compiling with xCode on macOS

int main (int argc, char **argv)
{
...
glutInit(&argc, argv);

I studied that if i don't compile with a.out and 2 values after I should get segmentation fault but I'm not getting it compiling without those values.

Answer 1

The segmentation fault to which you are alluding is a particular manifestation of program undefined behaviour .

But undefined behaviour is exactly that: you don't know what's going to happen.

Which is why you need to check the value of argc before reading any of argv .