Interview Question of the Day (IQOD) #1

[B1ackAnge1]

I like Why06's idea of the 'error of the day' so I figured i'd post some of the questions I have asked people while interviewing them for C++ Software Developer Positions.

These questions are usually written on a whiteboard (or printed out) and thus are meant to be answered WITHOUT the help of a compiler in an interview! So just read the code, don't copy/paste/build/run and just figure out what it does by reading.

I suggest you answer in a 'white font' so that others don't immediately see your answers


IQOD #1:
Consider the following program snippet:

#define   ABC    20
#define   XYZ    10
#define   XXX    ABC-XYZ

void main()
{
       int a;
       a = XXX * 10;
       printf("%d\n",a);
}

Question: What output is generated / is the value of 'a'?