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How to Initialize an Array

How to Initialize an Array

Question:
How do you initialize or assign values to an array in a class?

Answer:
The short answer is that you can’t initialize an array member as you would initialize a scalar data member. You can use memset to zero all the elements of the array inside the constructor’s body or use a loop that assigns values to each array element.

class A{ private:  int ar[10]; public: A()  {   for (int i=0; i<10; ++i)   ar[i] = i; }}

In most cases, it's best to use a vector object instead of a built-in array, thereby avoiding the initialization problem right from the start:

class A{private:std::vector < int > vi;//instead of array//...};

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