Trying to figure out name of data struct

Question

While going through some code, I came accross this block of code:

struct option options[] = {
    {"help", 0, 0, HELP_OPTION},
    {"minor", 1, 0, MINOR_OPTION},
    {"dac", 1, 0, DAC_OPTION},
    {0, 0, 0, 0}
};

I know what a struct is, but I have never seen a "{0, 0, 0, 0}" data struct. Does anyone know what the name for the "{0,0,0,0}" data struct is?

Answer 1

The code simply defines an array that contains several instances of option structures. In this case, the { 0, 0, 0, 0 } is probably used to signify that it is the last item in the array (since C arrays don't have a length property).

As far as the name, it is unnamed. You can reference this structure from code using options[3] .