A modifier, also called a modifying function is a member function that changes the value of at least one data member. In other words, an operation that modifies the state of an object. Modifiers are also known as ‘mutators’. Example: The function mod is a modifier in the following code snippet:

class test

{

int x,y;

public:

test()

{

x=0; y=0;

}

void mod()

{

x=10;

y=15;

}

};