Predict the output of following C++ programs.
A's assignment operator called A's assignment operator called
The class B doesn’t have user defined assignment operator. If we don’t write our own assignment operator, compiler creates a default assignment operator. The default assignment operator one by one copies all members of right side object to left side object. The class B has 2 members of class A. They both are copied in statement “b1 = b2”, that is why there are two assignment operator calls.
new called Constructor called Destructor called delete called
Let us see what happens when below statement is executed.
Test *x = new Test;
When we use new keyword to dynamically allocate memory, two things happen: memory allocation and constructor call. The memory allocation happens with the help of operator new. In the above program, there is a user defined operator new, so first user defined operator new is called, then constructor is called.
The process of destruction is opposite. First, destructor is called, then memory is deallocated.
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