Problem Instantiating a Class Instance in Its Own Constructor

Problem Instantiating a Class Instance in Its Own Constructor

Assigning a data member with another member of the same class in the member intialization list results in this:

class test{	public:		test (int y) : j (y), i(j)		{		}	private:		int i;		int j;};

The compiler generates an internal code for your written code:

test (int y){	i = j;	j = y;}

The compiler initializes and assigns data members in the same order in which you’ve made your member declaration. In this instance, the compiler has assigned the value of “j” to the variable “i” before it has assigned any value to “j.”

To avoid this, redefine your ctor the following way;

test (int y ) : j(y){	i = j;}

The compiler then generates the following code:

test(int y){	j = y;	i = j;}
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