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Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Apr 12, 2002

Place a Member Initialization List in a Constructor


In the following example, a member initialization list appears in the inline definition of the constructor, inside the class body:
 
class ratio {
private:
 int x, y;
public:
 ratio(int top, int bot) :x(top), y(bot){}
};

If you prefer to define the constructor outside the class, you can still use a member initialization list. First, provide only a declaration (i.e., a prototype) inside the class body:
 
class ratio {
private:
 int x, y;
public:
 ratio(int top, int bot); // no initialization list here
};

Next, place the member-initialization list in the constructor
Danny Kalev
 
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