this pointer in c++

[saneha]

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What is the meaning of it. Please explain it with help of example

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[Vuhelper]

* this means that reference of this pointer.If a user wants to return reference to the current object from a function,in such cases reference is taken from this pointer like(*this).
Example:
student student::setRollNo(int aNo)
{
...
return *this;
}