99. Constructors-I

Question.3

A developer initializes members in a specific order:

class Timer {
   int period;    // Declared first
   int prescaler; // Declared second
public:
   Timer(int p) : prescaler(p), period(prescaler * 10) {}
};

Timer t(5);
printf("%d", t.period);

What value does period hold?

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50 -- prescaler=5, period=5*10=50
Garbage -- period is initialized before prescaler (declaration order), so prescaler is uninitialized when period reads it
0 -- members default to zero
Compilation error -- circular dependency detected

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