99. Constructors-I

Question.2

Two developers initialize a const member:

Developer A -- body assignment:

class Sensor {
   const int id;
public:
   Sensor(int i) { id = i; }  // Assign in body
};

Developer B -- initializer list:

class Sensor {
   const int id;
public:
   Sensor(int i) : id(i) {}  // Init list
};

Which compiles?

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Both -- assignment and initialization are equivalent
Only Developer B -- const members must be initialized in the initializer list; assignment in the body is too late
Only Developer A -- initializer lists cannot handle const
Neither -- const members cannot be set in constructors

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