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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Mar 5, 1999

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Base Class Constructor With Arguments

When a constructor has to pass arguments to its base class constructor or to an embedded object, you must use a mem-initializer:
 
class base 
{
private:
  int num1;
  char * text;
public:
  base(int n1, char * t) {num1 = n1; text = t; } //no default constructor, all arguments must be supplied
};

class derived : public base 
{
public:
  derived (int n, char * t) : base(n, t) {}   // pass arguments to a base class 
};
Danny Kalev
 
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